EXPANDING AND CONTRACTING PET BOTTLE

摘要

PROBLEM TO BE SOLVED: To control the propagation of various bacteria and reduce the refuse volume by forming a PET bottle into the bellows shape, expand and contract a bellows section so as to set the liquid level of a content forming the upper section of the PET bottle at all times and sealing the PET bottle by a screw type cap. SOLUTION: When a content of an unsealed expanding and contracting PET bottle is exhausted at a time, a section of a screw type cap 1 and a lower section 5 are compressed by hands to make the PET bottle smaller and disposed. When the content still remains halfway, the lower section 5 is pressed by hands in the state of opening the screw type cap 1 and the expanding and contracting PET bottle is contracted to exhaust air in the PET bottle as much as possible, and when the screw type cap 1 is closed before the content is spilled, the air in the PET bottle is exhausted, and particularly a carbonated beverage or the like can be drunk in good taste for one week or so in the state similar to the unsealing state. The vacuum state is formed by exhausting the air in the PET bottle as described above to reduce the propagation of various bacteria, and also the size of storage site and the volume of refuse can be reduced by contracting the PET bottles.