Mainstays 40 oz Double-Wall Vacuum Insulated Stainless Steel Tumbler with Straw and Handle, White
Mainstays 40 oz Double-Wall Vacuum Insulated Stainless Steel Tumbler with Straw and Handle, White
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Mainstays

Mainstays 40 oz Double-Wall Vacuum Insulated Stainless Steel Tumbler with Straw and Handle, White

932 ratings
Mainstays 40 oz Double-Wall Vacuum Insulated Stainless Steel Tumbler with Straw and Handle, WhiteMainstays 40 oz Stainless Steel Tumbler with Straw and Handle Double Wall Insulated WhiteMainstays 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 Black
Actual ColorWhite

Key item features

  • Durable Construction: Constructed from 18/8 recycled stainless steel and BPA-free components, ensuring a robust build for daily use.
  • Ample Hydration: Features a substantial 40 oz capacity, providing a large size for daily beverages and reducing the need for frequent refills.
  • Insulated Performance: Designed with double-wall vacuum insulation, this tumbler maintains beverage temperatures effectively for extended periods throughout the day.
  • Portable Accessories: Includes a fitted lid, a reusable straw, and an integrated handle, making the tumbler easy to carry and convenient for sipping on the go.
  • Product Dimensions: Measures 10.47 inches in height, 3.94 inches in length, and 5.91 inches in width, weighing 1.29 pounds, presented in a clean white finish.
  • Everyday Utility: Ideal for a wide range of uses, including home, office, travel, sports, camping, parties, and general daily routines, offering durable metal construction.
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About this item

Product details

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Customer ratings & reviews

4.4 out of 5 stars
stars
932 ratings284 reviews
How item rating is calculated
  1. 5 stars75% (702)
  2. 4 stars8% (77)
  3. 3 stars5% (45)
  4. 2 stars3% (27)
  5. 1 star9% (81)

Reviews summary

Pros

  • : Holds plenty of liquid without needing frequent refills.
  • : Made with sturdy materials for a solid feel.
  • : Offers great quality at a lower cost.
  • : Maintains temperature for several hours with remaining ice.
  • : Keeps ice for several hours or even days.

Cons

  • : May break or crack with rough handling or drops.
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Showing 1-3 of 284 reviews

Jan 2, 2026
Reviewer name: Walmart customer
Item details
Color: Black
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

I wear a CPAP mask at night and like to have cold water to drink without taking off the mask. This bottle keeps water cold for a long time, and the straw can slip under the mask edge so I can sip some without taking off the mask. It will leak if rather full and ripped over while the straw is in. And the lid is a little fussy to get started right. If the kid isnt on perfectly even, it will leak if tipped.

Helpful?5O2GLGI87PAA5369411658
Jun 9, 2026
Reviewer name: Mark
Item details
Color: Black
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Worthwhile purchase.

I have only been using it for a few days, but it seems to be equivalent to the brand name tumblers used by family members and at one -half to one-third the cost. It is too soon to comment on the longevity of the coating or the functionality of the lid.

Helpful?5O2GLGI87PAA5369411658
Feb 10, 2026
Reviewer name: Kelly
Top Reviewer
Item details
Color: Black
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great value tumbler, does the job without the hype

I'm really impressed with the Mainstays 40 oz Stainless Steel Tumbler. For the price, it performs way better than I expected. It keeps my drinks cold for hours (even with ice), and the stainless steel feels sturdy and well made. The handle is comfortable and makes it easy to carry around, especially for long days or car trips. The straw is a nice bonus and works well for both water and iced drinks. I also like the size — it holds plenty so I don't have to constantly refill. It fits in my car's cup holder, which is a huge plus. Overall, this is a great affordable alternative to more expensive tumblers. If you want something practical, durable, and budget-friendly, this is definitely worth buying.

Helpful?5O2GLGI87PAA5369411658
Current price is $12.4431.1 ¢/oz
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