(under subclass 379) Subject matter wherein the sidewall is designed to move outwardly in response to pressure within the bottle, jug, or jar.
SEE OR SEARCH THIS CLASS, SUBCLASS:
900, for a cross-reference art collection of containers having a collapsible wall structure.
SEE OR SEARCH CLASS
220, Receptacles,
666, for a receptacle of that class type having a collapsible wall feature and cross-reference art collection 907 for beverage cans having a collapsible wall structure.
