There are storage bags, there are freezer bags and then there are the Zwilling Fresh & Save vacuum bags. The reusable airtight bags with the practical zipper are the aces up your sleeve: whether for freezing, sous vide cooking or marinating. With a generous capacity of 1. 25 litres, it never hurts to have a little more: Bread, vegetables, meat or fish - transform your fridge and freezer into your fresh market stall at home. Place the powerful vacuum pump (sold separately) onto the valve and extract the air out of the bags in just seconds. The only thing left to do is push button in the middle of the red silicone valve to seal it securely - aromas and vitamins are safely preserved and food stays fresh up to five times longer.