Thermos Stainless Steel Tumbler, w/ Slide Lock Lid, River Rock, 18 oz
Thermos Stainless Steel Tumbler, w/ Slide Lock Lid, River Rock, 18 oz
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Thermos Stainless Steel Tumbler, w/ Slide Lock Lid, River Rock, 18 oz

144 ratings
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Volume Capacity18
Actual ColorRiver Rock

Key item features

  • Temperature Retention: Thermos vacuum insulation technology ensures maximum temperature retention for both hot and cold liquids.
  • Durable Material: Made from high quality 18/8 stainless steel for long-lasting use.
  • Leak-Resistant Lid: Features a slide lock drink lid that is leak-resistant when closed and straw compatible when open (straw not included).
  • Clear View Lid: Lumiview lid provides a clear view of the contents inside the tumbler.
  • Comfortable Grip: Equipped with a Griptec molded handle and a non-slip, quiet, soft touch base for easy handling.
  • Convenient Cleaning: Disassembles easily for thorough cleaning and is top rack dishwasher safe for added convenience.
  • Universal Fit: Designed to fit most standard size cup holders, making it perfect for on-the-go use.
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About this item

Product details

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Customer ratings & reviews

4.7 out of 5 stars
stars
144 ratings90 reviews
How item rating is calculated
  1. 5 stars86% (124)
  2. 4 stars7% (10)
  3. 3 stars3% (4)
  4. 2 stars1% (2)
  5. 1 star3% (4)

Reviews summary

Pros

  • : Holds 18oz, perfect for drinks on-the-go.
  • : Has a highly visible color that does not fade.
  • : Made with high-end materials and exceptional craftsmanship.
  • : Retains cold temperatures throughout the day.
  • : Features a twist mechanism for easy closure.

Neutral

  • : It has an easy-to-hold shape but no rubberized outer grip.
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Showing 1-3 of 90 reviews

Jul 19, 2026
Reviewer name: GiGi
Item details
Color: Sea Green
Volume capacity: 24 oz
Sold and shipped byThermos LLC.
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Exactly what I wanted in a great color and at 26 oz it's a perfect size!

Helpful?3T1H813HDBGJ6263101152
Jan 20, 2026
Reviewer name: PAMELA A.
5 out of 5 stars
5 out of 5 stars review

Love the size and the

Love the size and the twist on lid and that the drinking hole is adaptable to use with a straw. As I have difficulty with handles on things like mugs, would have liked a rubber grip on the outside like Aquachile has.

Review from thermos.com
Helpful?3T1H813HDBGJ6263101152
Dec 13, 2025
Reviewer name: Barbara
5 out of 5 stars
5 out of 5 stars review

Replacement slides needed

Love this cup. Use it every day. *Having trouble finding the correct replacement slide. *

Review from thermos.com
Helpful?3T1H813HDBGJ6263101152
Current price is $25.64
Price when purchased online
  • Free shipping
  • Free Holiday returns until Jan 31

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Order within 6 hr 36 min
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Sold and shipped by Thermos LLC.
4.76 out of 5 stars
4.8 stars out of 5, based on 700 seller reviews(4.8)
Extended holiday returns
Free Holiday returns until Jan 31
Packaging note:

Ships in the manufacturer's original packaging, which may reveal the contents.