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Mainstays

20-ounce Clear Plastic Tumbler with Screw Top Lid and Straw, by Mainstays

421 ratings
20-ounce Clear Plastic Tumbler with Screw Top Lid and Straw, by MainstaysMS 20OZ CLEAR TUMBLE
Actual ColorClear

Key item features

  • Mainstays 20oz Clear Plastic Tumbler with Screw Top Lid and Straw for on-the-go hydration
  • Shatter-resistant, transparent plastic allows easy tracking of water intake
  • Straw enables convenient sipping during various activities (gym, hiking, events, etc.)
  • Durable and portable 20oz capacity provides ample hydration for hours
  • See-through body simplifies water level monitoring and cleaning, perfect for active lifestyles
  • Hand wash
  • with PP straw
Current price is $1.00
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About this item

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Customer ratings & reviews

4.6 out of 5 stars
stars
421 ratings65 reviews
How item rating is calculated
  1. 5 stars80% (337)
  2. 4 stars10% (42)
  3. 3 stars4% (18)
  4. 2 stars1% (4)
  5. 1 star5% (20)

Reviews summary

Pros

  • : Offers good quality at a lower cost.
  • : Has a high-quality build.
  • : Comes with a straw that stays in place.
  • : Suitable for car cup holders and personal water intake.
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Showing 1-3 of 65 reviews

Jun 12, 2026
Priscilla
Top Reviewer
Item details
Color: Clear
5 out of 5 stars review

Verified Purchase

Most Perfect Tumbler

Oh thank you Walmart, this is exactly what I needed and its priced especially low! The problem I had is my very old mother who has late term Dementia can't walk and must stay in bed and I have to hold her drinking glass for her, but she continually grabs the glass and straw from my hand to intentionally let it spill out all over her bed covers, and this Tumbler has resolved that problem and it works perfectly! A smaller ounce size would be ideal though. But this works. The Tumbler screws on tightly so her drink can't spill out and the straw has a stopper so she can't pull it out!

Helpful?6L77UYN0WWH417170064897
Apr 20, 2026
anonymous
Top Reviewer
Item details
Color: Clear
5 out of 5 stars review

Verified Purchase

perfect size for water intake!

I've always been a water drinker for over 40 years. Call me weird, but I only use a screw on lid and a straw . I toss it in the freezer at night. You actually burn more calories when the water is cold. The 20-oz size is a plus, too - keeps track of how much water I drink throughout the day. highly recommend!!

Helpful?6L77UYN0WWH417170064897
Jun 8, 2026
julie
Item details
Color: Clear
5 out of 5 stars review

Verified Purchase

This is a great tumbler; I like that the straw stays in when drinking. For people complaining they can't clean it because it's too narrow: simply take a cleaning sponge, cut into thirds, put a fork into the sponge and voila, you can now clean it.

Helpful?6L77UYN0WWH417170064897