I have a Springer/Lab/Doxie mix (Spud, I know, ADORABLE) that has been my service dog for many years. Something I always struggle with is ensuring I have food and water for him on shopping days. At the beginning of my disability, I didn't have a PCA, so anything that makes my life easier, I deeply value. I have some collapsible bowls for traveling overnight places, but they aren't practical for "out and about" days or treks in the woods, where I need to be watchful of what he's getting into. I've also tried a similar product, where you squeeze the bottle to push water out - it leaks everywhere and is built cheaply.
Then I ordered this lovely bottle.
When I say this thing is a game-changer, I mean I haven't used anything else since I ordered it. The bottle is ergonomic which is comfortable and suitable for my small hands, but not so narrow that it takes away from the volume. The cup is wide and deep, leaving plenty of room for my dog to drink without spilling everywhere. The plastic bottle threads on cleanly, and I haven't experienced any leaking issues.