Mainstays 20 oz Stainless Steel Double-Wall Tumbler with Straw Lid, Blue
Mainstays 20 oz Stainless Steel Double-Wall Tumbler with Straw Lid, Blue
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Mainstays

Mainstays 20 oz Stainless Steel Double-Wall Tumbler with Straw Lid, Blue

1,150 ratings
Mainstays 20 oz Stainless Steel Double-Wall Tumbler with Straw Lid, BlueMainstays 20 fl oz Stainless Steel Double Wall Tumbler Straw Lid Blue ColorMainstays 20 fl oz Stainless Steel Double Wall Tumbler Straw Lid Black 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

Key item features

  • Ready-use Accessories: Includes a straw lid and two straws for ready-to-use convenience. The unique four-way threaded lid allows for customized straw placement, promoting a more natural feel in hand.
  • Effortless Cleaning: Designed with a wide-mouth opening for easier cleaning between uses. The entire tumbler is also dishwasher safe, ensuring simple and convenient everyday care.
  • Durable Insulation: Constructed from 18/8 stainless steel with double-wall vacuum insulation, this design helps keep both hot and cold drinks at the desired temperature while offering a sturdy, reusable feel.
  • Enhanced Portability: Features an ergonomic handle for comfortable carrying and a shape that fits standard cupholders, making it easy to transport from car to desk or workout.
  • Modern Appearance: This 20 oz capacity tumbler is finished in blue, contributing a clean, modern look to its overall design.
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Customer ratings & reviews

4.3 out of 5 stars
stars
1,150 ratings258 reviews
How item rating is calculated
  1. 5 stars69% (799)
  2. 4 stars11% (127)
  3. 3 stars7% (77)
  4. 2 stars4% (42)
  5. 1 star9% (105)

Reviews summary

Pros

  • : Straw and lid can be removed for cleaning.
  • : Ideal for carrying and fitting in cup holders.
  • : Available in various attractive shades.
  • : Offers good features and performance for the cost.
  • : Made to withstand drops and regular use.

Neutral

  • : Can be smooth with silicone straw, but often proves difficult due to design.
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Showing 1-3 of 258 reviews

Sep 11, 2025
Reviewer name: Heather
Item details
Color: Green
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

I like it and the state is made where it does not leak.. although if you are someone who doesn't want to kind of bite down or push down on the straw w/ your lips you would want to go with something else. However if that doesn't bother you then I highly recommend it!

Helpful?1XBPWO68IP4C13478860878
Dec 29, 2025
Reviewer name: Diego
Walmart Associate
Item details
Color: Purple
5 out of 5 stars
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?1XBPWO68IP4C13478860878
May 24, 2026
Reviewer name: Angela
Top Reviewer
Item details
Color: Purple
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great Everyday Cup

I've been using this daily and it's honestly been really good for the price. It keeps my drinks cold for hours, and I love that it doesn't sweat on the outside. The purple color is super pretty, and the straw lid makes it easy to carry around with me. It feels sturdy and fits nicely in my cup holder too.

Helpful?1XBPWO68IP4C13478860878
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