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

1,165 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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Product details

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Customer ratings & reviews

4.3 out of 5 stars
stars
1,165 ratings259 reviews
How item rating is calculated
  1. 5 stars70% (810)
  2. 4 stars11% (129)
  3. 3 stars7% (77)
  4. 2 stars4% (42)
  5. 1 star9% (107)

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 259 reviews

Aug 19, 2026
Reviewer name: Remi
Item details
Color: Purple
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Nice cup

I really like the cup except you have to pull very hard to get something out of it. When I looked at the top piece really well I saw why. There's something in there that stops it from a full flow. If you take your scissors and cut the top rubber piece just passed that point it works perfect.. if you look at it, you'll see what I'm talking about.

Helpful?1XBPWO68IP4C13478860878
Jun 1, 2026
Reviewer name: Matt
Top Reviewer
Item details
Color: Purple
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great value and quality

This has an excellent seal, I can shake my drink up to mix it, and it doesn't make a mess. The straw is soft, although you do have to suck hard. I might make the opening a little larger but overall, I was really impressed for the price.

Helpful?1XBPWO68IP4C13478860878
Jun 12, 2026
Reviewer name: ATASHA
Item details
Color: Pink
3 out of 5 stars
3 out of 5 stars review

Verified Purchase

Not the best, but ok

It's ok for the price. The lid doesn't have a good ventilation hole so it's hard to suck through the straw. Spill proof straw is a neat feature. doesn't stay cold for as long as stated.

Helpful?1XBPWO68IP4C13478860878
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