Mainstays 20 oz Stainless Steel Double Wall Tumbler , Straw Lid, Black
Mainstays 20 oz Stainless Steel Double Wall Tumbler , Straw Lid, Black
Hero image 0 of Mainstays 20 oz Stainless Steel Double Wall Tumbler , Straw Lid, Black, 0 of 7
In 50+ people's cartsBest seller
Mainstays

Mainstays 20 oz Stainless Steel Double Wall Tumbler , Straw Lid, Black

4.3 stars out of 519 reviews
(4.3)|
519 ratings
Mainstays 20 oz Stainless Steel Double Wall Tumbler , Straw Lid, BlackMainstays 20 fl oz Stainless Steel Double Wall Tumbler Straw Lid Black ColorMainstays 20 fl oz Stainless Steel Double Wall Tumbler Straw Lid Green ColorMainstays 20 fl oz Stainless Steel Double Wall Tumbler Straw Lid Blue ColorMainstays 20 fl oz Stainless Steel Double Wall Tumbler Straw Lid Pink ColorMainstays 20 fl oz Stainless Steel Double Wall Tumbler Straw Lid Purple Color
Actual Color:Black
selected, Black, $10.96
Green, $9.47
Pink, $10.96
Purple, $10.96
Blue, $9.47, Out of stock

Key item features

  • Cold Retention: Featuring double-wall vacuum insulation, it keeps beverages ice-cold for hours, perfect for hot summer days or intense outdoor activities.
  • Durable Construction: Made from sturdy 18/8 stainless steel, this tumbler withstands daily bumps and scratches, ensuring long-lasting use.
  • Ergonomic Handle: Designed with an ergonomic handle, it provides a comfortable grip, making it easy to hold and drink from anywhere, anytime.
  • Travel-Friendly: With a 20-ounce capacity, it fits well in most car cup holders and exercise equipment, making it convenient for travel and workouts.
  • Easy Maintenance: The wide-mouth design allows for effortless ice addition and cleaning, and it's dishwasher-safe for added convenience.
  • Straw Lid: Comes with a straw lid and two straws, featuring a four-way threaded design for different straw placements based on your drinking hand preference.
Generated by AI
Current price is $10.96
Price when purchased online
  • Free 90-day returns

How do you want your item?

Try 30 days of Free Shipping with Walmart+! Choose plan at checkout.
How do you want your item?
Columbus, 43215
Arrives by Sun, Feb 1
.
Order within 5 hr 33 min
Sold and shipped by Walmart.com
Free 90-day returns
This item is gift eligible
walmart plus

Get free delivery, shipping and more*

*Restrictions apply
Try Walmart+ now

About this item

Product details

Specifications

Warranty

Warnings

Frequently bought together

Mainstays 20 oz Stainless Steel Double Wall Tumbler , Straw Lid, Black $10.96

Mainstays 20 oz Stainless Steel Double Wall Tumbler , Straw Lid, Black
current price $10.96

Mainstays 20 oz Stainless Steel Double Wall Tumbler , Straw Lid, Black

4.3 out of 5 Stars. 519 reviews

Best seller Great Value Sugar-Free WaterTok Variety Pack Drink Mix, 2.53 oz, 30 Count $4.98 $2.08/oz

Best seller
Great Value Sugar-Free WaterTok Variety Pack Drink Mix, 2.53 oz, 30 Count
current price $4.98
$2.08/oz

Great Value Sugar-Free WaterTok Variety Pack Drink Mix, 2.53 oz, 30 Count

4.6 out of 5 Stars. 2214 reviews
SNAP EBT eligible
Current price is $15.94
Items may be delivered on different dates

Customer ratings & reviews

4.3 out of 5 stars
stars519 ratings179 reviews
How item rating is calculated
  1. 5 stars70% (362)
  2. 4 stars12% (63)
  3. 3 stars7% (37)
  4. 2 stars3% (14)
  5. 1 star8% (43)

Reviews summary

Pros
  • : Allows for convenient cleaning of straw and lid.
  • : Ideal for carrying and fitting in cup holders.
  • : Available in various attractive shades.
  • : Made to withstand drops and daily use.
  • : Offers quality at a lower cost.
Neutral
  • : Can be effortless with soft silicone straw, but also notoriously difficult for some users.
Generated by AI

Customer images

  • +121 images
Filtered and sorted results would be available on the new 'Customer ratings & reviews' page.
Sort by |

Showing 1-3 of 179 reviews

Jun 9, 2025
Charlotte
Top Reviewer
Item details
Color: Blue
5 out of 5 stars review

Verified Purchase

My son's new favorite forever tumbler!

I have tried about a dozen different tumblers for my 2.5 year old son who loves water and this one is by far the best one! The size is perfect, design is super cute, no issues with leaking so far, overall it meets every requirement I'd have. Straw is easy to drink out of, no issues with suction. It keeps drinks cold with ice and we intend to purchase a second one. I would highly recommend this tumbler to anyone with kids!

Helpful?1XBPWO68IP4C13453350769
Dec 29, 2025
Diego
Walmart Associate
Item details
Color: Purple
5 out of 5 stars review

Verified Purchase

great buy!

the cup is great keeps hot and cold. kept ice for over 12 hrs. pretty good for a 10.00 cup. The one thing I don't care for is the suction power you need with the straw. it's truly leak proof so I get why you need to use a little more strength. aside from that the cup is awesome!

Helpful?1XBPWO68IP4C13453350769
Jan 15, 2026
Mikeymom
Item details
Color: Blue
5 out of 5 stars review

Verified Purchase

Cold all day

Delightful. Keeps beverages cold all day, seals tight, doesn't leak or drip. Easy top rack dishwasher cleanup. The straw is not a favorite. Don't like the texture and found it difficult to assemble for proper uptake. Insert a plasiic straw through the plug and it's perfect. Have two and will be purchasing at least one more.

Helpful?1XBPWO68IP4C13453350769