Tupkee Double Wall Glass Tumbler
A hand-blown double-wall borosilicate glass tumbler whose sip lid is also glass - one of the few hot mugs with no plastic in the drink path, sealed only with food-grade silicone.
The verdict: Silicone only
The cup is double-wall hand-blown borosilicate glass, and - unusually - the sip lid is glass too, so both the vessel and the lid your coffee flows through are glass. The only non-glass parts are food-grade silicone: the lid's leak seal, a grip sleeve around the cup, and a protective base disc. So the drink path is glass plus a silicone seal - silicone-only, and notable because almost every other "glass" travel mug still tops out with a plastic lid. It is not fully plastic-free (the silicone seal is what keeps it from that), but there is no petroleum plastic anywhere your drink goes, which is genuinely rare for a lidded hot mug.
What it's made of
| Part | Material | Food contact |
|---|---|---|
| cup body (double-wall) hand-blown double-wall borosilicate glass; the outer wall stays comfortable to hold with a hot drink | Borosilicate Glass | Yes primary 🔥 |
| sip lid glass sip lid - brand states the "glass lid delivers a natural taste, without any plastic or metal aftertaste" | Borosilicate Glass | Yes primary 🔥 |
| lid seal FDA food-grade, BPA-free silicone seal that prevents leaking - the only non-glass part in the drink path | Silicone | Yes seal 🔥 |
| grip sleeve silicone band around the cup for a non-slip grip; exterior, does not contact the drink | Silicone | No |
| base disc silicone disc on the bottom that protects the glass; exterior, does not contact the drink | Silicone | No |
Tupkee's double-wall glass tumbler is a hand-blown borosilicate cup with a matching glass sip lid. The double wall insulates a hot drink so the outside stays comfortable to hold. It's a sip lid rather than a locking leakproof commuter cap, and being inexpensive hand-blown glass it's breakable - treat it as glassware rather than a rugged commuter mug. Sold in several sizes and colors, with the glass sip lid available separately so a cracked lid doesn't total the cup.
Pros
- Both the cup and the sip lid are glass - the drink never touches plastic
- Double-wall borosilicate insulates hot or cold while the outside stays comfortable to hold
- Inexpensive and widely available for an all-glass mug; sold in several sizes
- Glass sip lid is sold separately, so a cracked lid doesn't total the mug
Cons
- Thin hand-blown glass; breakable and less travel-rugged than steel
- It is a sip lid, not a locking leakproof commuter cap
- Larger boba/smoothie variants use a straw lid that can add plastic - stick to the glass sip-lid models for a plastic-free path
Notes
- Sizes: 8 oz, 14 oz, 20 oz; colors include Black, Jacaranda, Niagara, and Cyan
- The glass sip lid is confirmed glass on its own replacement-lid product page; the main tumbler listings are vaguer about the lid material
- Country of manufacture is not stated on the listings
- The 20 oz boba/smoothie version uses a straw lid; confirm the straw material if a plastic-free path matters
Common questions
Does the Tupkee Double Wall Glass Tumbler have plastic in it?
No petroleum plastic touches your food. On the Tupkee Double Wall Glass Tumbler, the lid seal is silicone, and the rest of the food path is borosilicate glass.
What is the Tupkee Double Wall Glass Tumbler made of?
Part by part, the Tupkee Double Wall Glass Tumbler is: cup body (double-wall) — borosilicate glass; sip lid — borosilicate glass; lid seal — silicone; grip sleeve — silicone; base disc — silicone.
Does the Tupkee Double Wall Glass Tumbler have silicone in it?
Yes — the lid seal, grip sleeve and base disc are silicone on the Tupkee Double Wall Glass Tumbler. They are seals rather than surfaces your food sits against, which is borosilicate glass.
Is the Tupkee Double Wall Glass Tumbler BPA-free?
No plastic touches your food on the Tupkee Double Wall Glass Tumbler — the food path is borosilicate glass and silicone — so BPA, which comes from polycarbonate and epoxy plastics, is not in play here.
Categories: Travel Mugs & Tumblers
Sources
Every material claim above is backed by these. This is the scattered info we centralized.
- manufacturer https://tupkee.com/products/tupkee-double-wall-glass-tumbler-insulated-tea-coffee-mug-lid-hand-blown-glass-14-ounce hand-blown double-wall borosilicate glass tumbler sold with a lid; lists a silicone seal (leak prevention), silicone grip sleeve, and silicone base; marketed as BPA-free/all-glass
- manufacturer https://tupkee.com/products/tupkee-double-wall-glass-tumbler-replacement-lid-for-hand-blown-glass-travel-mug-14-ounce the sip lid is glass ("glass lid delivers a natural taste, without any plastic or metal aftertaste, lead-free") with an FDA food-grade, BPA-free silicone seal; sold separately as a replacement
- retailer https://www.amazon.com/Tupkee-Double-Wall-Glass-Tumbler/dp/B07DPFM3W7 retail listing for the 14 oz model; describes it as "All Glass Reusable Insulated Tea/Coffee Mug & Lid, Hand Blown"
Spot a mistake or something out of date? Let us know — corrections are how this stays accurate.