VacMaster Vacuum Chamber Pouches (12" x 14") 250 / Box. VacMaster vacuum chamber pouches are the industry leader for vacuum packaging. Constructed of heavy-duty 3 mil thick material to provide a superior pouch for optimum freshness and a positive reliable seal - protecting your food from freezer burn and dehydration. Food keeps fresh up to five times longer. Our high quality pouches can be frozen, refrigerated, microwaved or boiled.