The bottle releases water as your dog licksMade from stainless steel and BPA-free plastic, so they are hygienic, and contain no harmful chemicalsThe bottle releases water as your dog licksMade from stainless steel and BPA-free plastic, so they are hygienic, and contain no harmful chemicals1.Prevents waste2.Leak-proof and won't drip in your bag3.Large opening for easy clean and fill3.Clips to your bag or belt..