I have two of these and I use them all the time. You simply flip and squeeze, then flip closed. No separate opening or positioning of the bottle. Think of a kiddie cup sipper. It closes when you turn the sipper down, which is how the gulpy works. It's so easy to use.

The bottle and attached bowl are super durable. You can attach any other water bottle that fits the opening, but it won't close. This is good if you have big dogs like me. The one that comes with it works great, but my dogs need more water than that.

I like to store it in a cooler bag since my dogs enjoy cool or cold water instead of room-temp water.

I love it and highly recommend it. It comes in a variety of colors, and has a clip for attaching to your belt.

Pros: Easy to use, clean, durable, sanitary

Cons: None

I have a keeshond that gets very hot and drinks alot so this is a perfect bowl for him.

Pros: cleans easily

Cons: none

Great product...easy to clean, hard to tip, and very durable.

Pros: durable

Cons: none

I have one of these for my dogs, who get to try out most of the products I stock in my store. I like the design of this portable waterer compared to similar ones - this one is not complicated - just flip the bottle up and squeeze! You can also substitute any 16 or 20 ounce bottle of water you buy along the way - no having to pour from one bottle to another! This is very convenient and very portable.

Pros: Very Portable

Cons: none

This is great for a quick hiking trip or a little while in the sun. It's very convient since it doubles as a bottle and a bowl. It doesn't hold much water, and won't last long with my dog at all.

Pros: Quick and easy water bowl

Cons: Doesn't hold much water