Helically collapsible beverage bottle

A collapsible bottle comprising an apertured top and a base joined by a cylindrical sidewall, forming, a vertical axis between said top and said base;

• said sidewall comprising a plurality of helical segments integrally joined to comprise said sidewall;
• said segments each comprising:
• a groove ring,
• a connecting ring, and
• a ridge ring;
• such that said groove, connecting and ridge rings integrally join to form adjacent portions of said seaman;
• wherein said groove ring's diameter is less than said connecting and ridge rings' diameters, said connecting ring's diameter is less than said ridge ring's diameter;
• wherein said connecting ring comprises:
• an upper region adjacent to said groove ring,
• a lower region adjacent to said ridge ring, and
• a middle region;
• wherein said middle region is thicker than said upper and lower regions, thereby giving said connecting ring a substantially diamond-shaped cross-section which effectively locks the said adjacent ridge ring over said adjacent groove ring when so positioned.