Simple Modern 30 fl oz Insulated Stainless Steel Trek Tumbler with Straw Lid | Midnight Black
Simple Modern 30 fl oz Insulated Stainless Steel Trek Tumbler with Straw Lid | Midnight Black
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Simple Modern 30 fl oz Insulated Stainless Steel Trek Tumbler with Straw Lid | Midnight Black

5,480 ratings
Simple Modern 30 fl oz Insulated Stainless Steel Trek Tumbler with Straw Lid | Midnight BlackSimple Modern 30 fl oz Insulated Stainless Steel Trek Tumbler with Straw Lid Midnight BlackSimple Modern 30 fl oz Insulated Stainless Steel Trek Tumbler with Straw Lid Raspberry VibesSimple Modern 30 fl oz Insulated Stainless Steel Trek Tumbler with Straw Lid Winter WhiteSimple Modern 30 fl oz Insulated Stainless Steel Trek Tumbler with Straw Lid Seaglass SageSimple Modern 30 fl oz Insulated Stainless Steel Trek Tumbler with Straw Lid 80s MixSimple Modern 30 fl oz Insulated Stainless Steel Trek Tumbler with Straw Lid Almond Birch

Key item features

  • Vacuum Insulated: Double-walled and vacuum insulated to keep drinks hot or cold for hours.
  • Stainless Steel: Made from premium 18/8 stainless steel for durability and longevity.
  • Leak Resistant: Comes with a straw lid and two straws to prevent spills and leaks.
  • Ergonomic Handle: Designed with an ergonomic handle for comfortable carrying.
  • Cupholder Friendly: Fits standard cupholders for convenience on the go.
  • Generous Giving: Simple Modern donates more than 10% of profits and offers remarkable value.
  • 30 Ounce Capacity: Holds up to 30 fluid ounces of your favorite beverage.
  • Versatile Straw Lid: Four-way threaded straw lid allows for different straw placements based on preference.
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Customer ratings & reviews

4.8 out of 5 stars
stars
5,480 ratings3,989 reviews
How item rating is calculated
  1. 5 stars90% (4,921)
  2. 4 stars4% (194)
  3. 3 stars3% (149)
  4. 2 stars2% (83)
  5. 1 star2% (133)

Reviews summary

Pros

  • : Maintains low temperatures over an extended period.
  • : Fits comfortably in cup holders and easy to carry.
  • : Tumblers come in a wide range of bright colors.
  • : Keeps drinks at low temperatures over time.
  • : Does not leak when tipped or turned upside down.
  • : Offers great value at this cost.
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Showing 1-3 of 3,989 reviews

Sep 13, 2026
Reviewer name: Heidi
5 out of 5 stars
5 out of 5 stars review

Literally my favorite!

For me, the 30oz is the perfect size. It's not overly big and it's not too small. I have it in both black and the dark green and I love it so much. The dark green one was my first and I had it so long that the bottom has now become a little scuffed. I'm talking years. So I bought the black one next and I can tell you, these are the two that I reach for the most. I know a lot of time and creativity goes to the 40oz but I'm begging you to add some variation and attention to the 30. I'm a huge fan. Please don't neglect this one! Die hard fan!Thank you for making my favorite cup!

Review from Simple Modern
Helpful?1GUUAODXHJOC5073847585
Sep 11, 2026
Reviewer name: Stephen C.
5 out of 5 stars
5 out of 5 stars review

Right size, keeps things nice and cold

The perfect size. I bought two: one for home and one for work and they do a great job of keeping my ice water nice and cold. If there's any negative feedback it would be that there are too few color options. It's black and gray (the colors I purchased) and then 2 or 3 pastels. Offer a Navy Blue and a Kelly Green and a Red.

Review from Simple Modern
Helpful?1GUUAODXHJOC5073847585
Dec 26, 2025
Reviewer name: Emily B.
5 out of 5 stars
5 out of 5 stars review

My new favorite

This is my first 40 oz trek tumbler of many simple modern products. The color is absolutely gorgeous. I love the variety of sizes, types, & colors of the products. I normally use the 50 oz tumbler but this will be way more convenient since it will fit in my cup holders. Although this is the first 40 oz trek i own, I'm sure there will be many more to come!

Review from Simple Modern
Helpful?1GUUAODXHJOC5073847585
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