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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Double Wall Glass Tumbler - 14-Ounce, All Glass Reusable Insulated Tea/Coffee Mug & Lid, Hand Blown Travel Mug - Niagara

Product ID: 231328992

Details

Brand
Tupkee
Capacity
14 Fluid
Color
Niagara
Material
Borosilicate
Special Feature
Double Wall

🔥14oz double-wall insulation

🌡️Hand-blown borosilicate glass, thermal shock resistant

🛡️FDA-grade leak-proof silicone seal

$73.30

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

☕ Elevate your daily brew with style and science—because your coffee deserves the best!

GRIP GO - Silicone sleeve and anti-slip base provide a secure hold and stability—because spills don’t fit your lifestyle.
NO SPILL CONFIDENCE - FDA-approved, BPA-free silicone seal locks in every drop, perfect for your on-the-go hustle.
SIP PURE SIP CLEAN - All-glass lid ensures zero plastic or metal aftertaste—taste your coffee or tea in its purest form.
BUILT TO BRAVE TEMPS - Hand-blown borosilicate glass withstands microwave, freezer, and daily thermal shocks without breaking a sweat.
HOT HANDS COOL GRIP - Double-wall design keeps your drink hot or cold while your hands stay comfortable and condensation-free.

The Tupkee Niagara 14-ounce double-wall glass tumbler combines hand-blown borosilicate glass with FDA-grade silicone sealing to deliver a toxin-free, leak-proof, and thermally insulated drinking experience. Microwave and freezer safe, it keeps beverages hot or cold longer while maintaining a cool, comfortable grip. Designed for the modern professional, it’s a stylish, reusable travel companion that elevates your coffee or tea ritual with pure taste and practical durability.

Specifications

ASIN	B08HYN273Y
Age Range Description	Adult
Best Sellers Rank	#17,492 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #436 in Tumblers & Water Glasses
Brand Name	Tupkee
Capacity	14 Fluid Ounces
Color	Niagara
Customer Package Type	Protective Foam Inserts or Bubble Wrap
Customer Reviews	4.2 4.2 out of 5 stars (2,359)
Finish Types	Glossy or Smooth
Global Trade Identification Number	00854395007645
Included Components	Glass Tumbler, Lid
Is the item dishwasher safe?	No
Is the item microwaveable?	Yes
Item Dimensions W x H	3.2"W x 7.5"H
Item Weight	14 Ounces
League Name	ncaa
Manufacturer	Tupkee
Material Features	Insulated
Material Type	Borosilicate Glass
Number of Items	1
Occasion	Christmas
Other Special Features of the Product	Double Wall
Pattern	Solid
Product Care Instructions	Hand Wash Only, Microwave Safe
Product Style	Modern
Reusability	Reusable
Shape	Round
Size	14 Ounces
Theme	Food,Travel
UPC	854395007645
Unit Count	1.0 Count

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