Southern California gets so hot in the summer! We had to figure out something for our dogs to cool off in since we don't have a swimming pool. That something ended up being a Little Tikes Green Turtle Sandbox that we bought years ago for our dogs. We use it as a swimming pool in the summer months for them. I see now that Little Tikes has updated the design, but it still will fit the purpose we use it for with our dogs.
We bought a "sandbox" instead of a doggy pool because it does not have a rim that they can chew or attempt to drag around. The Little Tikes is much sturdier than a regular kiddy/doggy swimming pool. It's worked our really well. They have had it for six years or so and it still looks brand new.