Mainstays 20 oz Stainless Steel Double Wall Tumbler, Green
Mainstays 20 oz Stainless Steel Double Wall Tumbler, Green
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Mainstays

Mainstays 20 oz Stainless Steel Double Wall Tumbler, Green

4.3 stars out of 589 reviews
(4.3)|
589 ratings
Mainstays 20 oz Stainless Steel Double Wall Tumbler, GreenMainstays 20 fl oz Stainless Steel Double Wall Tumbler Straw Lid Green ColorMainstays 20 fl oz Stainless Steel Double Wall Tumbler Straw Lid Black 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:Green-Out of stock
Black, $10.96
Pink, $10.96
Purple, $10.96
Blue, $9.47, Out of stock
selected, Green, $9.47, Out of stock

Key item features

  • With a 20-ounce capacity, this travel mug is sized right for on-the-go use
  • It fits snugly into most cup holders in cars or on exercise machines, making it convenient for travel and workouts
  • Thanks to the double-wall vacuum insulation and 18/8 stainless steel construction, it can keep your drinks ice-cold throughout the day, perfect for hot summer days
  • The tumbler features a well-designed handle that offers a comfortable grip, allowing for easy sipping and reducing the risk of accidental drops
  • Presented in an attractive color, it not only serves its functional purpose but also adds a touch of style to your daily items
  • Crafted from high-quality 18/8 stainless steel, this mug is resistant to rust, scratches, and dents, ensuring long-term use and maintaining its appearance over time
  • Check out other Mainstays kitchen and home essentials
Current price is $9.47
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Customer ratings & reviews

4.3 out of 5 stars
stars589 ratings188 reviews
How item rating is calculated
  1. 5 stars69% (407)
  2. 4 stars12% (72)
  3. 3 stars7% (39)
  4. 2 stars4% (21)
  5. 1 star8% (50)

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.
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Showing 1-3 of 188 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?1XBPWO68IP4C13476920696
Sep 28, 2025
Susan
Top Reviewer
Item details
Color: Blue
5 out of 5 stars review

Verified Purchase

This is one of the best thermal cups that I own I've bought two of them in blue and green and they are what I drink out of every day and my drink stays cold exactly like it's supposed to I love both of my thermal cups and I love the way the lid just screws on and stays where I put it

Helpful?1XBPWO68IP4C13476920696
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?1XBPWO68IP4C13476920696