A stable bottom forms as the bag is filled and allows for an attractive product display at point of sale. A variety of barrier materials are available to optimally preserve contents. The bag can either be supplied with a step finish, with hot melt for heat sealed pinch top closure after filling, or alternatively as flat top to be sewn by the customer. Excellent sealing properties: When using heat seal closure, pinch bottom bags offer airtight sealing on both ends which protects the product from external agents and makes for sift proof packaging. This closure method simply requires reactivation of the pre-applied hot melt.