See how nested sippy cups use annular recesses and locking stems to stack with lids attached, p
See how a locking stem and annular recess enable sippy cups to stack securely with lids attache
An inward-angled container sealing lip redirects stacking friction away from the foil bond area to preserve seal integrity.
An angled sealing lip shifts stacking abrasion to the rim outer edge, preserving foil adhesion and the container's airtight seal.
A single ultrasonic-welded lid creates a hermetic seal, shows first opening, and can be reused to reclose liquid or paste containers.
This polymeric container integrates child-resistant closure tabs and a deformable gap filler to secure the closure, simplify assembly, and preserve appearance.