Recessed button vs. full-perimeter lock clamshells
Aug 28, 2026
Which lid style suits your product, your shipping costs and your closing machine?
Recessed button locks
Button locks sit inside the tray footprint. That allows smaller trays and denser case packing, which improves shipping efficiency.
Full-perimeter tab locks
Perimeter locks seal around the whole edge. They are popular for bakery and deli items where a tamper-evident, secure closure is important.
Machine compatibility
Our clamshell closing machine is designed for tamper-evident hinged lid containers from 8 oz to 64 oz — including the But-N-Loc® line from Eatery Essentials — so you get a secure, tamper-evident closure at up to 80 containers per minute.
Explore the machines
- Clamshell Denester — Separates nested clamshells and places them on the line.
- Clamshell Filling Systems — Accurate weighing and filling of fresh product.
- Clamshell Closing Machine — Closes and locks hinged clamshell lids automatically.
- Clamshell Labeler — Top, bottom and wrap labeling with print-and-apply options.
- End-of-Line Systems — Case packing, case sealing and palletizing.
