To provide a foldable bottle capable of contracting a volume when storing.SOLUTION: In a normal state in which a first annular wall 41, a second annular wall 43 and a third annular wall 44 are aligned in a substantially straight line as a distance from the cap 3 increases, a cap connection The second annular wall 43 is sandwiched between the first annular wall 41 and the third annular wall 44 in the radial direction when the wall 42 and the third annular wall 44 side are pressed to approach each other The folded state is obtained, and when pulled so as to separate the cap connecting wall 42 and the third annular wall 44 side which are close to each other in the folded state, the state returns to the normal state.(FIG.【課題】収納する際に体積を縮ませることができる折り畳み式ボトルを提供する。【解決手段】ボトル本体4は、キャップ3から離れるにつれて第1の環状壁41と第2の環状壁43と第3の環状壁44とが順番に略一直線に並べられている通常状態でキャップ接続壁42と第3の環状壁44側とを近付かせるように押圧した際に、第2の環状壁43が、径方向において第1の環状壁41と第3の環状壁44の間に挟まれる折り畳み状態となり、折り畳み状態で互いに接近したキャップ接続壁42と第3の環状壁44側とを離れさせるように引っ張ると通常状態に戻る。【選択図】図3
