Patent ID: 8210669

Claim:
A fluid container comprising: a main container; and a fluid storage unit that is formed inside the main container; wherein the main container is composed of at least three members including a first container forming member, a second container forming member and a third container forming member, the second container forming member and the third container forming member are removably attached to the first container forming member with the first container forming member therebetween, a locking mechanism for removably attaching the second container forming member to the first container forming member includes a first engaging unit formed to the first container forming member, a second engaging unit formed to the second container forming member, and an engagement holding unit disposed to the third container forming member, the second engaging unit engages the first engaging unit and can be elastically deformed and separated from the first engaging unit, and the engagement holding unit restricts elastic deformation of the second engaging unit so that the second engaging unit does not separate from the first engaging unit.