What is the curved bottom part made of? Does it mar or grip the table?

The bottom is made of the same metal exterior as the rest of the travel tumbler. My tumbler has not marred or gripped the table.

Anyone have trouble unscrewing the lid once it's been on? Got this for Christmas. Great mug otherwise, but it's extremely hard to unscrew the top.

I believe that a hot beverage will create a vacuum and make the lid nearly impossible to open. However, it does screw on tightly, but I don't have too much trouble getting it off.

Are replacement lids available? I now have three of them with problems. They are recent purchases and fail on the slider. Almost no liquid comes out

I've had two which are used every week day for a couple of years and never had this problem. I hope you get some useful feedback.

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THERMOS ALTA SERIES Stainless Steel Tumbler, 12 Ounce, Slate

THERMOS ALTA SERIES Stainless Steel Tumbler, 12 Ounce, Slate

Product ID: 184889522

Details

Brand
THERMOS
Capacity
12 ounces
Color
Slate
Material
Stainless
Special Feature
Dishwasher

🔒Leak-proof slide lock lid

🔥Keeps drinks hot up to 3 hrs

❄️Keeps drinks cold up to 10 hrs

33392CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Stay hot, stay cool, stay unstoppable with THERMOS ALTA! ❄️

TEMPERATURE MASTERY - Vacuum insulation technology locks in heat or chill for hours—your beverage’s personal climate control.
SPILL PROOF SECURITY - Innovative slide lock lid ensures zero leaks—carry it in your bag without a second thought.
SWEAT FREE CONFIDENCE - Exterior stays cool and sweat-proof, so no embarrassing rings or slippery grips during meetings or commutes.
EFFORTLESS MAINTENANCE - Dishwasher safe with minimal parts for quick, hassle-free cleaning—because your time is valuable.
DURABILITY MEETS DESIGN - Crafted from premium 18/8 stainless steel with a sleek slate finish—built to endure your busiest days in style.

The THERMOS ALTA SERIES 12oz Stainless Steel Tumbler combines advanced vacuum insulation technology with durable 18/8 stainless steel construction to keep beverages hot for up to 3 hours and cold for up to 10 hours. Featuring a leak-proof slide lock lid and sweat-proof exterior, this sleek slate tumbler is designed for professionals on the go who demand style, reliability, and convenience—all backed by a century of trusted THERMOS innovation.

Specifications

ASIN	B07XYRLP2P
Age Range Description	Adult
Best Sellers Rank	#91,395 in Kitchen & Dining ( See Top 100 in Kitchen & Dining ) #2,504 in Tumblers & Water Glasses
Brand Name	THERMOS
Capacity	12 ounces
Color	Slate
Customer Reviews	4.3 4.3 out of 5 stars (604)
Finish Types	Powder Coated
Global Trade Identification Number	00041205739524
Included Components	Stainless Steel Travel Tumbler
Item Dimensions W x H	3.3"W x 6.34"H
Item Type Name	Stainless Steel Tumbler
League Name	ncaa
Manufacturer	THERMOS
Manufacturer Part Number	TS1299DB4C
Manufacturer Warranty Description	Limited
Material Features	Insulated
Material Type	Stainless Steel
Model Number	TS1299
Number of Items	1
Occasion	casual
Other Special Features of the Product	Dishwasher Safe
Pattern	Solid
Product Care Instructions	Dishwasher Safe
Product Style	Tableware
Recommended Uses For Product	Travel
Reusability	Reusable
Shape	Round
Size	12 Ounces
Specific Uses For Product	Cold Drinks, Hot Drinks
Theme	Food & Drink
UPC	041205739524
Unit Count	1 Count

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