Swiggies holds 11 ounces of water or sports drink. It is strapped onto the wrist and has a pull top. It eliminates the need to carry water bottles, which can be cumbersome to carry and break your stride when you have to stop to take a drink. You just fill them up with cold water and go!! Both Swiggies supply you with the necessary 11 ounces of liquid to complete your workout without the risk of dehydration.