Excelity&reg; Handheld Bag Heat Sealer for Food Saver and Creates Airtight Containers Bag Heat Sealer,batteries included The Heat Sealer will easily reseal original plastic bags so food will stop being exposed to dust and bacteria Create airtight seal and prevent your food from tasting bland and stale and lock in freshness and flavor.Also safely pack cosmetics when traveling Place edge of poly or mylar bag in your sealer and slowly pull the bag through. Squeeze air out of bag before completing the seal to create vacuum effect. It easily attaches to refrigerators or any stationary metal surface so you will keep it handy in your kitchen, outdoor, cabinet or anywhere you need it.