StayLock is the clear choice to drive home impulse sales. Dual bar locks ensure a secure closure, even after multiple openings, while sidewall ribbing and chamfered corners increase strength and durability. PET (Polyethylene Terephthalate) have crystal clarity for superior product visibility as well as being flexible, yet durable to maximize strength and reliability. PET Staylock has exceptional performance in cold temperatures and accommodates freezing down to -22F.