top section 12 of the collapsible bottle includes an integrated threaded spout 20 that receives a twist cap 22 u2014 fig1 the cap can be a normal twist cap a flip lid a kicker valve or other known types of closures suitable for bottles there is also included a plastic bladder 24 u2014 fig1 connected below the spout 20 referring to fig3 there is shown a perspective view of the top section 12 of the bottle shown at 26 is the dovetail shape that keeps the top 12 and middle 14 sections of the collapsible bottle aligned and gives the bottle rigidity when handled and supported referring to fig4 there is shown a perspective view of a middle section 14 this section has an open bottom 28 and an open top 30 allowing it to fit and mate with the corresponding top 12 and bottom 16 sections while still containing the bladder 24 as illustrated in fig1 a and 16b this section has a dovetail shaped track 32 and 34 on each side 36 and 38 respectively of the section which allows it to mate in a sliding relationship with the top 12 and bottom 16 sections locking tab 40 includes a locking boss that mates with the top section 39 s locking indentations 42 u2014 fig3 thus allowing the bottle to be rigid at multiple volumes this allows handling of.