The Additional Capacity Reservoir increases the amount of water the Drinkwell Pet Fountain (50 oz size) will hold. By adding the Additional Capacity Reservoir you can double the amount of water in the Drinkwell Fountain, from 50 oz to 100 oz. This is ideal for multiple pet households.

Details:

• Adds 50 oz for a total of 100 oz
• Cuts down on refilling
• Supplies you pet with twice as much refreshing water
• Ideal for multiple cats and small dogs