See how a rotatable stopper covers a cup lid's drink opening, while protrusions limit rotation and support stacking.
Inclined external walls, asymmetric load columns, and an internal container improve stacking stability while protecting cargo from impact, theft, and handling damage.
Independent fluid passages and a lockable hinge let one container lid switch between spout and tube drinking for hot or cold beverages.
A bendable secondary coupling body engages during impacts to prevent accidental opening of a reclosable container cover.
A movable second cover exposes separate openings, helping users select comestibles from different compartments without mixing products.
A closing post flexes a pressure-activated tab toward the cavity to limit shifting, tipping, and damage to fragile contents.