Enjoy cold drinks anywhere. Simple to use: 1. Buy a beverage. 2. Place beverage in sleeve. 3. Wet Evap-A-Wrappa sleeve. 4. Place where sleeve is in a passing airstream. 5. Enjoy extremely cool beverage at roadside stops. Comes with two anchoring loops. Two standard sizes for store bought beverages (#1354-Small: 20 oz. & #1355-Medium:1 L) and one size made especially for a 1 L Nalgene Bottle. Sleeve also works dry, for added insulation with hot beverages.