Mainstays 40 oz Stainless Steel Tumbler with Straw, Handle and Double-Wall Insulation, Black
Mainstays 40 oz Stainless Steel Tumbler with Straw, Handle and Double-Wall Insulation, Black
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Mainstays

Mainstays 40 oz Stainless Steel Tumbler with Straw, Handle and Double-Wall Insulation, Black

989 ratings
Mainstays 40 oz Stainless Steel Tumbler with Straw, Handle and Double-Wall Insulation, BlackMainstays 40 oz Stainless Steel Tumbler with Straw and Handle Double Wall Insulated BlackMainstays 40 oz Stainless Steel Tumbler with Straw and Handle Double Wall Insulated PinkMainstays 40 oz Stainless Steel Tumbler with Straw and Handle Double Wall Insulated White
Actual ColorBlack

Key item features

  • Ample Capacity: Offers a substantial 40 oz capacity, providing generous room for water and other beverages throughout the day. It supports versatile everyday use across various activities.
  • Durable Construction: Crafted from 18/8 recycled stainless steel and BPA-free materials, ensuring a rustproof build without a metallic taste. Its one-piece design enhances product durability.
  • Insulated Features: Incorporates double-wall vacuum insulation to maintain drink temperatures. It comes complete with a lid, a reusable straw, and a large handle for effortless portability.
  • Defined Dimensions: Measures 10.47 inches high, 3.94 inches long, and 5.91 inches wide, weighing 1.29 pounds. Its specific size contributes to practical handling and transport.
  • Versatile Aesthetics: Features a sleek black finish, presenting a simple yet versatile look. This design is suitable for diverse settings, including home, office, and on-the-go activities.
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About this item

Product details

Specifications

Warnings

Customer ratings & reviews

4.4 out of 5 stars
stars
989 ratings293 reviews
How item rating is calculated
  1. 5 stars75% (739)
  2. 4 stars9% (86)
  3. 3 stars5% (50)
  4. 2 stars3% (28)
  5. 1 star9% (86)

Reviews summary

Pros

  • : Holds plenty of liquid without needing frequent refills.
  • : The tumbler keeps beverages chilled with ice intact for up to 48 hours.
  • : Offers great quality at a lower cost.
  • : Made with sturdy materials for a solid feel.
  • : Maintains temperature for several hours with remaining ice.

Cons

  • : May break or crack with rough handling or drops.
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Showing 1-3 of 293 reviews

Sep 12, 2026
Reviewer name: Victoria
Top Reviewer
Item details
Color: Black
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Huge cup

This cup holds a lot of liquid which is why I got it. I'm going thru a urinary infection and my doctor has me taking antibiotics and lots of fluids and I needed something that would hold a lot of ice and water It keeps my drinks cold for hours and the ice stays in the cup also for hours. Pretty good insulation

Helpful?5O2GLGI87PAA5298196424
Aug 6, 2026
Reviewer name: Bast
Top Reviewer
Item details
Color: Pink
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

GOOD VALUE GOR PRICE BUT WATCH THE LID CAREFULLY!

The cup is very well insulated and the surface texture allows easy gripping even when the handle isn't in use. The reason why I rated the lid lower is the center swivel was broken when it was delivered and I didn't have the time option for a return as I needed an emergency use mug. 🙀

Helpful?5O2GLGI87PAA5298196424
Jul 8, 2026
Reviewer name: anonymous
Top Reviewer
Item details
Color: White
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

great value

love how much drink it holds and the length of time it stays cold.

Helpful?5O2GLGI87PAA5298196424
Current price is $12.4431.1 ¢/oz
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