U-Konserve
U-Konserve builds its food storage around designing plastic out: containers are 18/8 (304) stainless sealed with platinum-grade silicone lids, so the only non-steel part is the silicone that makes the lid leak-resistant. That's a genuine plastic-free posture - the food sits in steel, and silicone does the sealing job plastic would normally do. The brand's whole lunch-and- storage line is organized around that steel-plus-silicone formula rather than plastic tubs.
How clear are their specs?
Materials are named specifically - 304 stainless body, platinum-grade silicone lid - with no coatings or hidden plastic to account for.
Lead testing disclosure
U-Konserve's site says products are "tested by CPSIA-accredited independent labs" and are "free of lead," but names no specific lab, provides no report link, and cites no actual test numbers or detection limits - a compliance-style claim, not disclosure. Independent XRF testing (Lead Safe Mama) has found lead in a sealing dot on a U-Konserve insulated cup, but U-Konserve does not publish, link to, or promote any of that testing.
- manufacturer https://ukonserve.com/pages/product-information bare "free of lead," "CPSIA-accredited independent labs" claim with no lab name or numbers
