无铅可重复使用饮水杯：哪些品牌已明确确认，哪些品牌保持沉默

Why there is lead in drinkware at all

Vacuum insulation works by pulling the air out of the cavity between two stainless walls. That air has to leave through a port, and the port has to be sealed permanently, with something that flows at low temperature, wets stainless cleanly and never cracks as the vessel is heated and chilled thousands of times. Lead-bearing solder does all four things cheaply. That is the entire reason it is used — not flavour, not strength, cost and reliability.

On a well-made bottle that pellet is then covered by a welded or crimped stainless cap. It sits on the outside of the outer wall, separated from your drink by two layers of steel and a vacuum. The exposure risk in normal use is not the drinking water. The risk is that the base cap comes off — through a hard drop, corrosion, or a manufacturing fault — and the pellet is exposed to hands, benches and mouths.

Stanley confirmed publicly in January 2024 that it uses an industry-standard sealing pellet containing lead, covered by a stainless layer. They were not doing anything unusual; they were the brand that got asked. Most of the industry has been doing the same thing for decades. What has changed since is that a handful of manufacturers moved to lead-free sealing — and those are the ones now willing to say so.

Special note: the brands that have not confirmed lead-free

We contacted every drinkware brand in our catalogue and asked one question: *is there any lead anywhere in this product, including the vacuum sealing pellet?* We accepted a written statement, a published materials page or a test certificate. We did not accept "our products are food safe", because food safety standards do not cover the outside of the base cap.

Confirmed lead-free, on the record

• Fressko — 18/8 stainless inner and outer, lead-free vacuum sealing method, published on their materials page and confirmed to us directly. This is the reason Fressko heads this comparison; it is the only brand here that answered the question in specifics rather than reassurances.
• Frank Green — states lead-free construction publicly across its stainless and ceramic-lined range.

Question does not apply

• HuskeeCup — a single-wall reclaimed coffee-husk composite. No vacuum cavity, no sealing port, no pellet. Also no insulation, which is the trade.

Not confirmed at time of publication

• Chilly's — food-grade 18/10 stainless is documented, but we could not obtain an on-record statement about the sealing pellet in the vacuum cavity. This is not a finding of lead. It is a finding of silence, and we report it as such.

We will update this page the moment any of these positions change. If you are a brand listed as unconfirmed and you have a statement or certificate, send it to us and we will publish it.

What we could and could not test ourselves

We are an editorial site with a bench, not an accredited laboratory. We can inspect a base cap under magnification, we can tell you whether a sealing dot is exposed or covered, and we can run consumer-grade lead swabs on the exterior surfaces you actually touch. We cannot destructively assay a solder pellet, and we will not present a swab result as laboratory analysis. Where our evidence stops, we say so.

Every vessel in this test passed a surface swab on the base, lip and interior. That tells you the surfaces you contact are not shedding lead. It does not tell you what is sealed underneath a cap that is still intact — which is exactly why the brand's own statement matters more than anything we can do here.

How to check a bottle you already own

1. Turn it over. If the base is a smooth, uninterrupted stainless dome with no cap, disc or dot, there is likely no accessible sealing point.
2. If there is a circular cap or plug at the centre of the base, that is the vacuum seal cover. Leave it alone. Do not pry, sand or drill it.
3. If that cap is missing, loose, or has been damaged in a drop, stop using the vessel — regardless of brand.
4. Ask the manufacturer the specific question: *what material seals the vacuum port?* A brand that has gone lead-free will answer immediately, because it cost them money to do it and they want the credit.

What we would buy

If lead-free is your deciding factor and you want insulation, buy the Fressko Camino 340ml for coffee or the Fressko Move 500ml for all-day drinking. Both are confirmed lead-free, both survived our 200-cycle wash simulation with no retention loss, and both sell replacement seals so the cup outlives its gaskets.

If you want to remove the question entirely and can live without insulation, the HuskeeCup 8oz has no vacuum cavity to seal.