Will a straw fit thru the top opening? What is the diameter of the top sip opening

I’ve bought two of these at different times. The older one fit a straw easily, the newer one’s opening is much smaller, with some effort you can squeeze a straw into it but it’s jammed in very tight. Since they are glass, I think the opening size will be variable.

Will the 14oz double wall Tupkee tumbler be returning to stock ?

This item was a COMPLETE waste of $$$$$!!!!!

If the lid is made of glass, is it possible that after 2 weeks of use the mouth of the lid changed the shape from smooth to wavy? I used hot coffee as

No, for glass to change it’s shape, it would have to be heated to a temperature many times hotter than the hottest coffee.

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☕ Elevate your sip game with style and science!

GRIP GO - Silicone sleeve and base provide a secure, non-slip hold and protect your tumbler on the move.
THERMAL TOUGHNESS - Hand blown borosilicate glass withstands extreme temps from freezer to microwave without cracking.
SIP PURE SIP SAFE - All-glass lid ensures zero plastic taste or toxins—pure flavor every time.
STAY HOT STAY COOL - Double wall design keeps your coffee piping hot and your hands comfortably cool.
EFFORTLESS CLEAN STYLISH - Removable silicone parts for easy hand wash and a sleek cyan design that elevates your daily ritual.

The Tupkee Double Wall Glass Tumbler is a 14-ounce hand blown borosilicate glass travel mug featuring double wall insulation for superior temperature retention. It includes a leak-proof FDA food-grade silicone seal and sleeve for secure, toxin-free sipping and a non-slip grip. Microwave and freezer safe, this cyan tumbler combines durability, elegance, and practical design for the modern professional on the go.

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