Paw Boss Paw Wash for Dogs (With Dark Hardwood Vinyl Skin) Soap & soak every paw with fresh CLEAN soapy water without going back and forth to the sink; NEVER reuse dirty water. Built-in clean and dirty water reservoirs allowing you to wash up 4-8 paws on one filling (depends on how high you fill the wash cup- max 2.25) Very pet friendly (non-invasive) & gentle on those paws. No moving parts, simple to use, even for kids. Proven (with the use of antibacterial soap) to remove 99.5% of the bacteria and 99.9% of the fungi from the pet's paws. Recommended by vets for dogs with allergies. Wash opening is 3.5" diameter at 2.25" max deep with removable soft & flexible finger-like cleaning pad in bottom of wash cup; should accommodate most size dogs.