In 25+ people's cartsOverall pick
Mainstays

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

Mainstays 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 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 Color:Black

Key item features

  • Durable Material: Made from 18/8 recycled stainless steel, ensuring a BPA-free and rustproof construction.
  • Insulated Design: Features double-wall vacuum insulation to keep beverages at the desired temperature for longer periods.
  • Generous Capacity: Holds up to 40 ounces, making it ideal for staying hydrated throughout the day.
  • Reusable Straw: Comes with a reusable straw, promoting eco-friendly practices and convenience.
  • Versatile Use: Suitable for various activities such as swimming, sports, travel, camping, and parties.
  • Convenient Handle: Equipped with a large handle for easy carrying and handling.
  • Health-Safe: Made of food-grade stainless steel, ensuring no harm to human health and no metallic taste.
Generated by AI
Current price is $12.4431.1 ¢/oz
Price when purchased online
  • Free 90-day returns

How do you want your item?

Try 30 days for just $1! Choose a plan at checkout.
How do you want your item?
Ships to
Arrives by Today
.
Order within 13 hr 36 min
Sold and shipped by Walmart.com
Free 90-day returns
This item is gift eligible
walmart plus

Try 30 days of Walmart+ for just $1!

T&C apply.

About this item

Product details

Specifications

Warnings

Customer ratings & reviews

4.4 out of 5 stars
stars838 ratings267 reviews
How item rating is calculated
  1. 5 stars76% (634)
  2. 4 stars8% (70)
  3. 3 stars5% (39)
  4. 2 stars3% (23)
  5. 1 star9% (72)

Reviews summary

Pros

  • : Holds plenty of liquid without needing frequent refills.
  • : Keeps cold for hours, even overnight.
  • : Offers great quality at a lower cost.
  • : Maintains temperature for several hours with remaining ice.

Cons

  • : May break or crack with rough handling or drops.
Generated by AI

Customer photos

  • +17 images
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 267 reviews

Jun 20, 2025
Johnny
Item details
Color: Black
5 out of 5 stars review

Verified Purchase

it will keep us overnight easily. keeps everything cold I love it. the only thing I don't like the lid is a little difficult to put on. and it's top heavy it will tilt over very easily. but I would order another one without thinking twice about it highly recommend it

Helpful?5O2GLGI87PAA5298196424
Jan 2, 2026
Walmart customer
Top Reviewer
Item details
Color: Black
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?5O2GLGI87PAA5298196424
Nov 2, 2025
Anita
Top Reviewer
Item details
Color: Black
5 out of 5 stars review

Verified Purchase

Great cup for water drinkers

If water is your drink of choice, this LARGE 40 oz cup is what you need to own. It has a stainless steel inside and a plastic outside. The lid screws on and the only way to drink out of it is the tough plastic straw. If you don't want to drink out of the straw, you can unscrew the lid and drink out of the cup. Be aware that if you spill it, EVER YTHING will get wet!

Helpful?5O2GLGI87PAA5298196424