within the container to escape through the vent holes when the cap is loose application_number US 58081495 A description referring to fig1 i provide a bottle 10 preferably having an inner shell 12 which is blow molded from plastic in the conventional manner the shell 12 could also be made from non corrosive materials such as aluminum stainless steel or other material which meets fda standards for food and beverage containers attached to the inner shell is an optional outer shell 14 which i prefer to make in three pieces first there is a reinforcing wrap 15 made of a strong plastic or metal such as stainless steel or aluminum which is wrapped about the center of the inner shell 12 this reinforcement is applied by cementing the layer to the inner shell alternatively it may be placed in a blow mold when the inner shell is made and attached during molding i also provide an upper end portion 13 of the outer shell which is attached to the upper portion of the inner shell 12 by cementing or during molding finally there is a lower portion of the outer shell 17 which is similarly made of metal or hard plastic to provide reinforcement this too can be cemented to the inner shell 12 or made a portion of the inner shell during molding because the bottle is designed to withstand both vacuum or negative pressure as well as to function above atmospheric pressures i may design the top portion 13 so that it has an inner surface 23 which conforms and attaches to the inner shell 12 as shown in fig1 similarly an inner surface 27 is provided on the bottom portion 17 and is attached to inner shell.