ECOlunchbox
ECOlunchbox designs plastic out rather than around it, and is willing to eat a real tradeoff to do it: the flagship Three-in-One uses no gaskets whatsoever, so it's genuinely fully plastic-free but deliberately not leak-proof. Where it needs a seal for wet foods, the Seal Cup and Splash Box lines reach for silicone lids rather than plastic — an honest, plastic-free-first posture with silicone as the only concession.
How clear are their specs?
Materials are simple and stated — stainless steel bodies with silicone lids on the wet-food lines — and the brand is upfront that the gasket-free models trade leak-proofing for being fully plastic-free.
Lead testing disclosure
In a customer Q&A, ECOlunchbox states its stainless steel is "tested to make sure they don't leach any dangerous hard metals, like lead, cadmium or nickel" by "a third-party certified testing company," but does not name the lab, cite a testing standard, or publish actual numbers/detection limits - closer to a reassurance than a real disclosure. No dedicated testing/safety page or lab report was found on ecolunchboxes.com.
- manufacturer https://ecolunchboxes.com/blogs/news/you-asked-we-answered customer Q&A stating stainless steel is tested by "a third-party certified testing company" for lead/cadmium/nickel, with no lab named and no numbers published
