Does Stanley have lead?
Last reviewed July 2026.
Yes — in the sealed base, and the brand says so itself. Stanley confirmed (January 2024) that it uses an industry-standard pellet containing some lead to seal the vacuum insulation, while stating no lead is present on any surface a user or the drink touches. Class actions followed over the historical non-disclosure — Brown et al. v. Pacific Market International, No. 24STCV02653 (Cal. Super. Ct., L.A. Cty.) and Franzetti v. PMI, No. 2:24-cv-00191-TL (W.D. Wash.); the federal case was dismissed in January 2025 with leave to amend. An allegation is not a finding, and a dismissal is a dismissal — today the pellet is disclosed, which is why this row sits in the disclosed tier rather than below it. The exposure path the plaintiffs and the brand both discuss — a damaged or detached base cap — is covered in our base-cap guide.
The facts on file
| Verdict | Disclosed & sealed — Lead in the seal — disclosed, encapsulated |
| Vacuum-seal method | industry-standard sealing pellet containing lead at the vacuum base, covered by a stainless base cap; Stanley states no lead on any surface that contacts the user or contents |
| The brand's claim | “"No lead is present on the surface of any Stanley product that comes into contact with the consumer nor the contents"” |
Public record: Brown et al. v. Pacific Market International LLC, No. 24STCV02653 (Cal. Super. Ct.); Franzetti v. PMI, No. 2:24-cv-00191-TL (W.D. Wash., dismissed Jan 2025) (source). Allegations concerned historical non-disclosure; no finding of liability.
Sources — read them yourself
How to read this
Nearly every insulated bottle on the market seals its vacuum with a small pellet at the base, and the industry-standard pellet contains lead — sealed under a metal cap, away from the drink and your hands. The questions that separate brands are which sealing method they chose and whether they say so plainly: a documented lead-free seal, an acknowledged-and-encapsulated pellet, or silence. "Accessible components are lead-free" is a carefully scoped claim — see how the sealing methods differ and what a damaged base cap changes.
See where Stanley sits against every brand we track →
Drinkware Score indexes what brands publish about their vacuum-seal construction and what the public record shows, with attribution — we test nothing and make no health claims. A verdict describes the state of the published evidence about a sealing method, not the safety of any bottle. A sealed, inaccessible component containing lead is a different fact from lead a user can touch, and we keep those facts separate on every page. If a brand publishes new evidence, the page changes — the source always wins.
← The ranking: measured cold-hold