The fluid container comprises a body, a neck, and a mouth. The neck is deformable from a first stable condition to a second stable condition, allowing the relative angle of the mouth to be changed.本發明之流體容器包括一本體、一頸部及一嘴部。該頸部可從一第一穩定狀態變形至一第二穩定狀態,而允許改變該嘴部之相對角度。