My only complaint is I wish the bottles were more see through so we could see the water level line without having to walk up close to check it. And they came with the floaters to see the water levels. (the little ducks or turtles that float inside the water bottles) - and if they sold a bag of replacements of them as well since we lost a bunch down the sink drain.
Love the top fill options. Makes it easier for us to just fill a pitcher with spring water and refill their bottles that way. Also like that the bottles are on the outside of the cage so they don't climb, chew and make them fall over like some other ones we had in the past.
We went through several different types and brands and this is by far the best.
They have different mouthpieces also that you can buy separately depending on what works better for your pet or which type of animal you have. (remember just because it says it's for chickens for example doesn't mean that it won't work great for your rabbits too)
We got a bunch of the x shape mouth pieces. The cross tip kind for our guinea pigs and they work great. We got the bowls for the babies until they were strong enough to use the cross tip kind (since there's a small bead up in there - like a ball point pen) that they have to push on with their teeth or tongues and the babies aren't strong enough at birth. The bowls work for a little bit for that, but then we switch right back to the cross tips because the bowls get very dirty and there's no way to clean them out without having to dump the entire bottle out. And with spring water we don't like to waste any of it.
& Not all of my bottles came with the spring loaded holders, which sucks because I really really like them. They attach to many different types of cages, C+C, regular rectangles, chicken wire, outdoor huts, and the pens like shown in pics.
*Helpful tip - if your bottles are leaking or your cage is wet from your piggy 'playing' with the water bottles, try putting the bottles at a higher height. Most rodents, guinea pigs especially, should be lifting their head/chins up to reach the water spicket. If it's level with them and they are tilting their heads on an angle to get it, it makes it easier for them to lay there and chew and play with. The water should be running down their throats, not pouring out the sides of their cheeks.
!!!(you might find an off brand similar bottle with an orange cap instead of a red one... Not much difference at all, except the lid wears out faster so it doesn't click down super snug after a couple uses. It's slightly thinner cheaper plastic I think that's why. Cheapest option for us was to buy these ones in groups of 2)!!!
+Return/exchange policy is great &+ so it shipping and packaging!!