SToK – Small Silicone Containers – Camo Design Series Constructed of high food grade silicone, these jars set the standard for non-stick storage. Our patent pending design is modular and stackable so that jars and lids stack onto themselves and each other for neater storage. Redesigned interior bowl with no corners that eliminates scraping. Locking teeth on lid and base for a safe and tight seal that won’t pop open.