PURPOSE: To improve seal property both in cold seal strength and heat resistance by comprising a multilayer film comprising at least an outer heat seal layer and a core gas barrier layer, including predetermined polymers of propylene in the heat seal layer, and having at least one sealed part.

CONSTITUTION: These containers comprise at least a multilayer film comprising an outer layer being a heat seal layer and a core layer being a gas barrier layer, and the heat seal layer comprises polymers copolymerized with 1 to 20% by weight of two or more alpha-olefins having from 2 to 8 carbon atoms to propylene, to have at least one sealed part and obtain a container structure such as a bag with improved seal property both in cold seal strength and heat resistance. This bag shows an excellent quality in seal strength at cold temperature and when heated. For example, when this bag is used for wrapping a food, the food can be subject to pasteurization after the food is put in the bag, which is then evacuated, and heat sealed or closed with a clip.