The soft, flexible bracelet contains a refillable reservoir. When you first get the bracelet, you remove the plug on the reservoir and fill with a sanitizer of your choice – gel sanitizer works best! The bracelet will expand as it fills with the sanitizer. Each refill will give you 6 to 10 normal uses. Simply fill your bracelet once in the morning and go about your day with no worries. Never forget your hand sanitizer at home again!