Heres what to know about heavy metals used to make your favorite water bottle.

Recently the brand is getting some less-positive attention for using lead in part of their sealing process.

Its understandable why the possibility of lead exposure from your new favorite tumbler would be a cause for concern.

Stanley Cup Hydroflask and Klean Kanteen on designed background with question marks

Stanley uses the heavy metal in production but claims that consumers shouldnt worry.

Once sealed, this area is covered with a durable stainless steel layer.

Competitors have taken this time to publicize their longstanding decision against lead in their sealing processes.

Klean Kanteenstated on its accountthat Sealing insulated bottles with lead-free plugs costs more than using lead.

Theyd rather create a lead-free product and avoid any potential risk to consumer safety.

Commonly sold tumbler brands like Yeti, Coleman, Crave and many others have yet to comment.