YISAMA 5 Vacuum Valves and Handpump, Magic Valves for Storing Foodstuffs,Become Normal Flask in Reusable Bottles. SPERCIAL FEATURES: 5 valves which will convert your disposable bottles into impressive vacuum containers. ECONOMY: You will notice significant savings on your supermarket expenses. SAVE THE WORLD: You are helping the environment by reducing waste. No batteries expenses. FOOD STORAGE:They are used for grains, fruits, sauces, doughs, meats, cheeses.You can put food in your baggage without it running out. IDEAL FOR RESTAURANT: With these valves you can organize the kitchen and increase the life of the storage food.