I was searching for a product like that. I made an experiment in which I poured a glass of water on the cover. The back seat stays dry. So now I can bring my Rexie to the lake with me!

Easy to fill, easy to carry, doesn't leak, and my puppy was able to drink from it easily--it is especially useful on a long walk on a hot day. Excellent and useful product, good value.

Bought the guide on a whim and it's been an eye-opener. The privacy and security considerations are something every parent should be aware of before making a purchase.