I absolutely love this water bottle! It’s perfect for going to the park with my dog especially because I don’t waste any water if she doesn’t drink it all when I offer her some. The pink color is super cute and I’d recommend the bigger size unless you have a small dog that doesn’t drink much. My dog is a 44 lb. Siberian Husky / Australian Cattle Dog mix so she can drink a lot. I don’t use the locking mechanism on the bottle and haven’t had any issues with it leaking. I also don’t use the carrying strap since I have a waist pack with a water bottle holder that it fits in.