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Mainstays

Mainstays 18 oz Black Double Wall Stainless Steel Tumbler with Handle, Flip Lid

Key item features

  • Hydration Capacity: This travel tumbler can hold 18oz of your favorite beverage, perfect for water, smoothies, iced coffee, or iced tea.
  • Temperature Retention: Double-wall vacuum insulation and durable 18/8 stainless steel construction keep drinks ice cold for several hours.
  • Durable Design: Features a handle for easy drinking and enhanced durability.
  • Convenient Size: The 18 oz mug fits in most cup holders, making it ideal for use in the car or on exercise equipment.
  • Easy Cleaning: Wide mouth design is easy to clean and dishwasher safe.
  • Versatile Use: Suitable for keeping beverages cold in the summer or hot in the winter.
  • No Sweating: Double wall construction ensures the tumbler does not sweat.
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Current price is $10.24
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About this item

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Customer ratings & reviews

4.4 out of 5 stars
stars
179 ratings36 reviews
How item rating is calculated
  1. 5 stars77% (138)
  2. 4 stars8% (15)
  3. 3 stars4% (7)
  4. 2 stars3% (5)
  5. 1 star8% (14)

Reviews summary

Pros

  • : Ideal for personal use and small spaces.

Cons

  • : The lid can be hard to remove and blocks the drinking flap.
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Showing 1-3 of 36 reviews

Dec 3, 2025
Elanea
Top Reviewer
5 out of 5 stars review

Verified Purchase

Get it!

I would recommend this cup 100x over! In fact I've tried to have another one mailed to me and I'd delivered to me twice and it keeps saying out of stock. It's not out of stock on the website though, so not sure what's going on. However, this cup holds ice for well over 12 hours for sure! I keep it on my desk(school teacher here) I love the fact that it doesn't have to have a straw to use it! I hate the silicone straws. It DOES NOT LEAK! I snap the lid closed after adding my collagen to my ice and water and then shake it up, very vigorously I might add. 😂Not one drop is spilled. My students laugh at me and say, “Mrs G, I can't believe that hasn't spilled over all you yet.” Buy the cup. You won't be disappointed. As soon as I can get another one in, it'll be used for my coffee. Right now, I strictly use the one I have for my water.

Helpful?34R8XZ7AHJKZ5419977798
Dec 21, 2025
Maria
Top Reviewer
5 out of 5 stars review

Verified Purchase

This is great we moved and I now I cannot find my other coffee thermos so I got this one and it works out great enough for coffee. It really leaves it warm for a while. A long time. I suggest you buy me can't go wrong with the price and with the quality of it, I recommend it to anybody.

Helpful?34R8XZ7AHJKZ5419977798
Jul 13, 2025
Pamela
Top Reviewer
5 out of 5 stars review

Verified Purchase

Nice little go cup

Its a go cup. Perfect for taking a hot beverage with you and not have to worry about spilling it. It does keep the drink hot but if it is left for a few hours it will loose the heat. Normal.

Helpful?34R8XZ7AHJKZ5419977798