Very convenient, you press it and the water comes out, the dog drinks, you leave the bottle and it sucks back whatever water is left. Of course, it doesn't keep the water cool. I take off one star because it easily leaks if it turns on its side (e.g., inside a bag).

Convenient. It doesn't leak (much) even when upside down. When you release the pressure, the water in the dish goes back into the bottle (and doesn't go to waste).
The dish is big enough for my dog (golden retriever).
However: it seems like it won't last long. It's hard plastic that needs to be squeezed, so it's difficult, and you quickly realize that it will break. It may be 500ml, but precisely because it comes out by squeezing the bottle, you can never get all the water out, so you always carry around 100ml-200ml for free.

Very useful product helped me a lot during my travels. Just need to press it slowly because otherwise the dog gets wet.

Very practical!! We have had it for five months and it has been very helpful! It fits in the cup holders of the car.