... use! No spills, no hassles! *The volume is 500ml. Handi-Drink Portable Pet Bowl B43Features:*Unique, all-in-one, instant use! No ... , no backwash.Veterinarians and breeders agree that dogs should not drink water from public fountains, or from lakes, rivers, and ... which can be contaminated with harmful bacteria. Handi-Drink makes fresh, clean water 100% portable, easy, safe and sanitary for your dog ...