Genisys Vacuum Canisters have excellent ability for food preservation. When doing outdoor activity, store foods such as sandwitch ＆ salad in Genisys with vacuuming. You can taste freshness when taking out the foods. Use Genisys Vacuum Canister especially when vacuuming the foods that are easy to be squeezed ＆ runny such as sandwitch, salad ＆ marinated meat.