The Stansport 2-Liter Hydration Reservoir is ideal for keeping your drinks fresh at the campsite. It has a wide mouth opening which can easily accommodates drink mixes and ice cubes and it includes a patented bite valve for easy drinking. Made of durable polyurethane it will survive for years of use and is microwave and BPA safe. YOu can utilize the large opening for easy access to clean and dry the reservoir.