US Patent 11957234 Flexible structure for collapsible flasks and bottles

A flexible structure may be configured to expand a collapsible flask. The flexible structure may include a first loop made of an elastically flexible material and a second loop made of an elastically flexible material. The first loop and the second loop may be operatively coupled together at a first intersection and a second intersection. The first loop and the second loop, together, may be elastically movable between a compressed configuration in which the first loop and the second loop are sufficiently narrow to fit through an opening of the collapsible flask, and an expanded configuration in which the first loop and the second loop are not sufficiently narrow to fit through the opening.