WHAT MAKES GLASS THE BEST MATERIAL FOR A PET FOUNTAIN?

What Is the Most Hygienic Material for a Cat Fountain? Glass vs. Stainless Steel vs. Ceramic vs. Plastic

If you've shopped around for a cat fountain, you've probably noticed they come in four materials: plastic, stainless steel, glazed ceramic, and now – thanks to Brook – glass. You’ll see product pages shouting over each other about things like capacity, pump noise, and filtration hype – but almost none of them talk about what ultimately matters most for your cat's health: how clean the fountain actually stays.
 

That’s because the primary factor for cleanliness is the material the fountain is made from – and when you compare the four options on the factors that determine hygiene, glass comes out clearly ahead.

The Four Factors That Determine Pet Fountain Hygienics

Hygiene effectively comes down to how quickly bacteria take hold (and how long they stay there), how easy the fountain is to clean, whether the material stays safe over time, and how easily you can check the water condition. We’ll go through each it detail:

1. Porosity: How Fast Bacteria Take Hold

This is the single most important factor.

 

Every wet surface eventually grows biofilm – the slimy, slippery layer of bacteria you've probably felt on the inside of a water bowl that’s sat out too long. Bacteria needs surface texture to anchor onto and begin to propagate. Therefore, the smoother the surface, the slower bacteria takes hold. And the smoothness of the surface is referred to as “porosity”.

 

Glass is the least porous of the four materials. Its surface is the smoothest at a microscopic level, giving bacteria the least to grip. Glass fountains grow biofilm the slowest.

 

Stainless steel and glazed ceramic are close behind on their own. But in practice, most steel and ceramic fountains are built with plastic components – clips, brackets, filter holders, pump housings – and those plastic parts become the weak link.

 

Plastic is the most porous and scratch-prone material. Every sponge pass, every scrub with a brush, and every scrape of a cat's tongue leaves micro-scratches. Over time the surface gets rougher, and biofilm forms faster and faster. A plastic fountain that's a year old is far more textured than one fresh out of the box.

 

Because all-glass fountains have the least plastic in the water path, they're the least porous option overall – and the most resistant to bacterial growth.

2. Ease of Cleaning: The Fountain You'll Actually Clean

In the real world, fountain cleanliness overwhelmingly depends how often it actually gets cleaned. And since we’re all human – that means the fountain that's easiest to clean is the one that will get cleaned regularly.

 

Glass is the only material where every part can safely go in the dishwasher. If you're washing by hand, there are no seams, nooks, or crannies to work around – it rinses clean completely, with nothing left behind in hard-to-reach spots.

 

Ceramic and stainless steel surfaces are easy enough to clean on their own. The problem is the plastic components attached to them. Those create seams where bacteria thrive and make the parts unsafe for the dishwasher.

 

Plastic is the hardest to keep clean, and it's worse than most people realize:

  • Plastic should never go in the dishwasher – even the ones that claim "dishwasher safe". It expands when heated, warps, and absorbs detergent smell.
  • Hand-washing isn't much better. Sponges and brushes leave micro-scratches, which shed microplastics into the water and make the surface more textured – and more hospitable to bacteria – with every wash.

So the easiest material to clean is also the one that gets cleaned most often. That's what makes glass the most hygienic choice from a practical standpoint, real-world standpoint.

3. Material Consistency: What Happens When It Gets Scratched

Every fountain eventually gets scratched, chipped, or worn – but what does that mean for the water?

 

Glass is glass all the way through, and it's completely inert. A scratch or chip won’t change what's touching the water – it's still glass. Nothing leaches.

 

Glazed ceramic depends entirely on the glaze staying intact. Once it chips or cracks, the unglazed ceramic underneath is exposed, and depending on the clay and glaze used, it can leach substances into the water.

 

Stainless steel is a safe material when it's high-grade and solid throughout. But many fountains labeled "stainless steel" are made with cheaper base metals and a thin coating to cut costs. Moreover, stainless steel must be “passivated” to achieve a shiny, rust-resistant finish, which is usually done with harsh chemicals. A cat's rough tongue is surprisingly abrasive, and over time it can wear through the surface to whatever is underneath.

 

Plastic can leach compounds over time, and the micro-scratches that make it harder to clean also accelerate the breakdown of the surface.

4. Water Visibility: Can You Tell When It's Time to Change the Water?

Very often, the best reminder to change the water is to actually see that it needs a change.

 

Glass gives you a clear view of the water from any angle. A quick glance tells you whether it's clean, whether the level is low, and whether anything has gotten in. It takes two seconds and you'll do it every time you walk past.

 

Ceramic and stainless steel are opaque. You have to lean over and look down into the bowl to check – and most people don't.

 

Plastic is sometimes clear, which is a point in its favor on visibility alone. But it loses to glass on every other factor, and clear plastic clouds and scratches over time, so the advantage fades.

Cat Fountain Materials Compared

Glass Glazed Ceramic Stainless Steel Plastic
Porosity Lowest – smoothest surface Low (glaze only) Low (if high-grade) Highest – scratches easily
Dishwasher safe Yes, all parts Usually not (plastic parts) Usually not (plastic parts) No
Seams and crevices None Yes, at plastic joints Yes, at plastic joints Many
Safe when scratched or chipped Yes – inert throughout No – exposed ceramic can leach Depends on grade and coating No – sheds microplastics
Water visibility Full None None Partial, clouds over time
Hygiene ranking 1st 2nd 3rd 4th – avoid

The Verdict: Ranking Cat Fountain Materials by Hygiene

  • Glass – the most hygienic option on every factor that matters

  • Glazed ceramic – a solid second choice, as long as the glaze is fully intact and the plastic components are minimal

  • Stainless steel – roughly tied with ceramic, but typically harder to clean and harder to verify material quality

  • Plastic – the least hygienic option. Avoid it if you can

Glass wins paws-down – and it’s the clear choice (pun intended!)

FAQ

Is a glass cat fountain safe? Won't it break?

It’s important to look for fountains made from glass that’s high-quality, thick and durable. Glass pet fountains are heavier and more stable than plastic fountains, which actually makes them harder for a cat to tip over. Like any glass item, they can break if dropped, but in normal daily use on a floor, this is rare. But just in case, look for a fountain that has all spare parts available in case of an accident!

Can I put a glass cat fountain in the dishwasher?

Yes – and glass is the only fountain material where every part can go in the dishwasher. The pump itself should be hand-cleaned, but all glass components are dishwasher-safe.

Why does my plastic cat fountain get slimy so fast?

Plastic is the most porous and scratch-prone fountain material. Micro-scratches from cleaning and from your cat's tongue create texture that biofilm (the slime) anchors to. The older the plastic fountain, the faster it gets slimy.

Is stainless steel or ceramic better for a cat fountain?

They're roughly tied on hygiene. Ceramic edges out stainless steel if the glaze is intact, because many "stainless steel" fountains use coated lower-grade metals that can wear through. Both are usually built with integrated plastic components, which is their shared weakness.

MORE ANSWERS
Title

    Learn more

Why You Must (Not "Should") Get a Cat Fountain

INDULGENCE OR NECESSITY?

A cat fountain might seem like an indulgence. Or another burdensome gadget to replace something simple – a bowl. But it’s not. And it’s not even a “nice-to-have”, but a must-have – for one simple reason: your cat’s health. In this article we will explain two things:

  1. Why a fountain increases hydration
  2. Why that’s vital to your pet’s health and longevity

How does a pet fountain encourage hydration?

The short answer: moving water.

The slightly longer answer: Remember that in the wild – still, stagnant water means contamination. Moving water is continually oxygenated and exposed to light – both of which inhibits the growth of microorganisms – and moving water physically disrupts the formation of large bacteria colonies. Cats don’t know this, of course – but they “know” it instinctively – i.e. it’s been hard-wired into them through millennia of evolution. They will avoid still water and favor moving water instead.

A panther drinking from a forest stream and a cat drinking from a Brook fountain, thinking: This water is safe

Why is hydration important:

“Who cares how much they drink?” You probably didn’t think that – because we all kind of know hydration is important. But it’s especially important for cats – and critical for modern house cats!

By far, the leading cause of death for indoor cats is Chronic Kidney Disease (CKD). The root causes of CKD are complex and multifactorial (shout out to our friends at the FOUNDATION FOR FELINE RENAL RESEARCH pioneering research in this area) – but one of the most salient factors appears to be chronic dehydration resulting from our modern reliance on dry cat food. Dry food, combined with the common practice of free-feeding (providing unlimited access to kibble) is a recipe for dehydration.

Illustration of a cat with its kidneys highlighted in red

This is especially problematic for cats because cats naturally have a low thirst drive! In the wild they rely on their food for the majority of their fluids.

Without enough water, cats become dehydrated, which can lead to kidney disease. In fact, one of the first things a veterinarian will tell the owners of a cat diagnosed with CKD is to take measures to encourage hydration!

But CKD is just part of the story. Dehydration in cats also leads to urinary tract infections, poor digestion, lethargy, and a host of other conditions.

Black and white cat drinking from a Brook glass fountain

Healthy Skin and Shiny Coat

Now the picture should be clear why a well-maintained pet fountain, topped off with clean water, is one of the most important items in a cat household:

  1. Cats have evolved to associate moving water with freshness and safety, a trait that can be traced back to their wild ancestors. Having a steady source of attractive moving water will encourage hydration.
  2. Ensuring your cat stays adequately hydrated isn't just a matter of convenience; it's a critical component of their health care, akin to their diet or environment.

That’s why a pet fountain isn’t merely a luxury – it’s an essential tool that taps into your cat's natural instincts and supports their health and longevity.

Where To Place Your Pet Fountain

So you made the (correct) decision to get your pet a drinking fountain – here’s to hydration! 🍻

But where should you put it? This guide walks you through everything you need to consider when finding a place for your cat or dog drinking fountain in your home.

Cat sitting behind a Brook glass fountain on an orange splash mat in a living room

In planning placement, the key goals are:

  • Maximize utilization (i.e. drinking)
  • Avoid water quality disruption (contamination & temperature)
  • Make cleaning & maintenance as easy as possible

With that in mind, here are the steps:

Maintain Distance from Food and Litter

The litter part may be obvious – you want to drink where you 💩? But keeping distance from food is also important, especially for cats. Remember, in the wild – food (think: dead carcass) near the water implies contamination. Animals know this instinctively. So place the fountain a healthy distance away from the food bowl – even if it’s just across the room or on the other side of your kitchen.

A panther drinking next to raw meat and a cat by a fountain beside its food bowl, thinking: That water is not safe

Avoid Direct Sunlight

Direct sunlight not only promotes algae growth, but can warm up the water. This reduces oxygenation and promotes growth of all kinds of microorganisms. Avoid placing near a window, and consider where the sun rays will fall as the angle and path of the sun changes during the year (a shady spot in summer may become sunlit in winter).

Avoid Strong Air Currents

Air currents – such as from air vents, fans, frequently-open windows, and other drafty areas can cause a number of problems. First, they can cause excess contamination from dust and debris carried by the air. Second, they can cause unwelcome temperature changes. Third, they can also deter pets from drinking if they are strong enough to move their whiskers and dry their eyes while they drink. Place your pet fountain where the air is relatively still and stable.

Two placements compared: a fountain next to a radiator, marked with a red cross, and a fountain next to a plant, marked with a green check

Simplify Maintenance

Locate the fountain in a spot that is convenient for you to perform regular cleaning and water refills. Proper maintenance is key to ensuring the fountain remains a clean, appealing source of hydration – and the harder it is for you to do it, the higher the likelihood you’ll put it off or neglect it!

Ensure Visibility and Monitoring

Place the fountain where you can easily glance-check the water level and cleanliness without going out of your way. Transparent fountains, such as the Brook glass pet fountain, are ideal for this.

Ensure Accessibility

This consideration is especially important for senior pets and multi-pet homes. Ensure that the fountain is easily accessible, ideally from multiple directions. Ensure there are multiple paths to access the fountain without feeling trapped. An open approach allows pets to drink without stress.

Additionally, balance the placement between quiet and isolated. The fountain should be within easy access, but not in a high-traffic area (remember, in the wild pets are especially vulnerable when they drink, so seek a tranquil spot). A fountain in a semi-active area can encourage more frequent visits without overwhelming your pet.

Keep it Near the Play Area

Cats and dogs, like all mammals, dehydrate from activity. And if your play area involves a Treat Puzzle Feeder (as it should!) – fishing for dry snacks can make them thirsty! So make it easy for them to get a drink after they play and might be feeling too tired to wander far.

A kitchen corner with a Brook fountain, labeled: easily visible for glance-check, quick to clean and refill, not in direct sunlight, away from draft, close to play area, low-traffic area but easily accessible

Minimize Noise

While the pumps on most pet fountains these days are pretty silent, the flowing water can still produce a trickling sound. While that’s attractive for your pet, it might be bothersome for you – so select a location where you won’t be inconvenienced. As far as your pet – quieter areas can make skittish pets more comfortable approaching the fountain.

Find Suitable Flooring

Consider the type of flooring in the fountain's vicinity. Avoid hardwood or wood composite. Flowing water produces micro-splatter that can damage the wood over time. Moreover, moving water is slightly cooler, so fountains can develop condensation on humid days, which will drip onto the floor. Finally, pets can splash while they drink! So ensure placement on a water-resistant floor (such as tile or vinyl) or a protective mat – or both!

Consider the Power Source

This will probably be your first consideration – “Where’s the outlet?!” – but it should actually be your last. If there is an ideal spot near a power outlet – great! If not: don’t panic – or compromise. Either run an extension cord, or plug your fountain into a medium-size portable power bank. They are relatively inexpensive and can run your fountain for weeks on a single charge!

Place Multiple Fountains

Feeling overwhelmed by all the above? 🙀 What if there’s just no ideal spot in your home? And even if there is, your house or apartment might be big – and there’s no telling where the cat might decide to hang out! The easiest way to solve this is by simply having multiple fountains. Yes – it’s more maintenance and adds expense – but hydration is one of the most important thing for your pet. And this is especially important for senior pets, who might have a harder getting around – while especially needing hydration for maintaining kidney function. So do it for their health!

Floor plan of an apartment with a cat’s paw-print trail and three fountains marked in different rooms

And there you have it! By considering these factors, you can create an optimal hydration station (or two, or more!) that not only fits well within your home – but seamlessly fits into your routine while enhances your pet’s health and lifestyle. Remember, a well-placed pet fountain can make all the difference in encouraging your pet to stay hydrated! Drink up!

The Dirty Truth Behind Pet Fountain Filters

The Promise of Multistage Filtration: More Hype Than Help

Many pet drinking fountains on the market today boast increasingly complex multistage filtration systems, featuring everything from resins to multilayer filter materials in elaborate arrangements. While these features might sound beneficial, they are little more than marketing gimmicks. The truth is, these sophisticated-sounding filters are not only redundant but can also be ineffective, unnecessarily expensive, and environmentally wasteful. In some cases, these filters can even do more harm than good by impeding water flow, adding area for bacteria to grow, and introducing chemicals into your pet’s drinking water.

A pile of multistage filter cartridges next to an unimpressed cat, thinking: Meh

Why the Hype?

Why are pet fountain manufacturers engaged in this arms race? Two reasons:

  1. It makes their fountain sound better than the other guy’s – ”what, they only have five filter layers?! Ours has seven! And a phone app for each!”
  2. It conveniently justifies proprietary and expensive filter replacement cartridges – turning simple hydration into a high-maintenance money sink.

The Reality: Filtration is the Flow

Contrary to what marketers might want you to believe, a pet fountain purifies the water primarily through its own core function – the flow of the water. Why are animals in the wild instinctively drawn to moving streams rather than stagnant pools? The movement of water is naturally effective at keeping water fresher and cleaner.

A panther drinking from a forest stream and a cat drinking from a Brook fountain, thinking: This water is safe

Why is flowing water cleaner?

In a word: aeration – the mixing of oxygen into the water. Oxygenated water deters the growth of pathogens and harmful microorganisms, which prefer anaerobic (low-oxygen) conditions. Oxygen-rich environments discourage the growth of algae and the formation of biofilms (think surface-slime).

In addition, the agitation caused by the flow physically disrupts the formation of microorganisms.

Flowing water

  • Aerated – high dissolved oxygen
  • Water mixed top to bottom
  • Low microorganism growth
  • Fresh & clear
  • Attractive to animals

Stagnant water

  • Non-aerated: low dissolved oxygen
  • Stale water
  • High microorganism growth
  • Foul odor & cloudy
  • Repellant to animals

Is any filtration beneficial?

For pet fountain operation, a coarse debris filter is needed to protect the pump from hair and larger particles. Beyond that, the addition of activated carbon can be beneficial because it effectively removes a broad spectrum of impurities that might be present in the water.

What About Resin Filters?

As for resin, which is often touted for its water-softening capabilities, it's largely redundant when carbon is already used. Activated carbon can perform much of the water-softening task by itself. If your home has significant issues with water hardness, this is best addressed with a comprehensive upstream (pun intended) solution – like an under-sink or whole-house filtration system, or even a pitcher filter for drinking water – which would then be used for human and animal consumption.

Brook’s No-nonsense Approach: Effective and Affordable

At Brook, we strive for straightforward solutions. That's why our fountains utilize a simple yet effective combination of a coarse filter and activated carbon. This approach ensures that your pet's water is clean and safe without unnecessary complexity, cost and waste.

Complete filtration

Particle filter and activated carbon for purification

Brook's black foam particle filter ring and a mesh packet of activated carbon
Particle filter DebrisActivated carbon Purification
Brook's quiet pump, which draws the water through both filters

That’s also why our filter replacements are so affordable – we don’t charge you a marketing gimmick premium. You’re welcome! Just remember to replace the filters on-schedule and rinse before use. And please use your saved money to buy your pet a new toy : )

All Articles