Great design except for weak strap
The detachable drinking trough is very well designed. Holding it by the top (like a ladle) allows you to offer dogs water without crouching or getting slobber on your hands. Pouring water in to the top portion and letting it run into the bottom helps to minimize spillage and keeps the slobber away from the mouth of the bottle so you can share the water supply. The reason I gave only 3 stars is that the plastic strap broke off the cap when carrying it on a carabiner. The attachment point is not strong enough to support the weight of the full bottle, and is only useful for cap retention. I consider this a pretty major flaw, otherwise I would have given 5 stars. Fortunately REI happily replaced it for me, and I improvised a carrying loop with some paracord tied around the neck.