Petmate Replendish Reservdelsfilterlock / Lock X-Small & Small

Finally found a cap that actually stays put — the threaded seal is tight enough that my puppy can’t knock the bowl over without a leak. Fits the small size perfectly, and swapping out the old one took about ten seconds. Worth it just for the peace of mind during dinner time.

Our old cap was getting gross with mineral buildup, so this black replacement was a perfect fit for the small bowl we have. Sits snugly and the whole watering setup feels clean again, which is all I really wanted.

The cap arrived a bit dusty on the inside, but after a quick rinse it snapped onto my fountain perfectly and seals better than the original did. My small dog hasn't managed to pry it off yet, which is the main thing I needed.