TWO Thermoflask 40oz Insulated Water Bottles Only $17.99 at Costco

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Thermoflasks 2-packs on boxes on shelf

We love a good Costco deal!

Through March 1st, Costco is offering members this Thermoflask Insulated 40oz Water Bottle 2-Pack for just $17.99 (regularly $22.99) – in-store only. Note that if ordering online these are $19.99 shipped for members.

These ThermoFlask bottles are double-wall vacuum insulated which helps keep your beverages cold for 24 hours or hot for 12 hours. Each bottle has a wide mouth and stays sweat-free. Plus, the huge 40oz size will help keep you hydrated all day long!

Not a member? Consider snagging a Costco membership to score this great deal!

Note that the instant $5 savings is available for members only. Non-members will pay $26.24 shipped.

Thermoflask Bottles on shelf at Costco

On the fence? Check out these readers’ reviews…

I use these for work and they are amazing. I put ice water in them and drink them through out the day, after work I leave it in my car until the next day and theres still ice cold water the following day.


I bought these for my kids and they’ve been great! No, they don’t fit in the water bottle holders on any of their sports bags, but I hook a carabiner on between the bottle and some sort of strap and it’s been fine. I like that they hold more water than our usual bottles and keep it cold. We live in south FL, and between all day outdoor swim meets, baseball and football conditioning, these have been perfect! Also, I like that there is a rubber holder around the bottom, so when my kids come home and drop all their stuff on the ground, it doesn’t make a huge crash.


Check out the best Costco home deals here!

Join The Discussion

Comments 6

  1. Sherry

    These water bottles are great but do not fit in car cup holders, so I found Mug buddies on Etsy which fixes the problem!! They work great!!

    • SamShops

      Thanks for the tip! I found a similar product in amazon for about $11 less than the Etsy model – Smart Kup

  2. June

    I like the Etsy shop, it is local and supports small American made business, which helps everyone. Choose made in the USA!

  3. Kristin

    We LOVE these. We bought four last fall and they look new still. Use them every single day!

    • Jennifer (Hip Sidekick)

      Our whole team loves these, Kristin!

  4. Rico

    They are Great Deals ! Interestingly enough, Costco’s most recent offering is the 24oz. pair (with Instant Savings) and they are MORE than the 40oz. Promo. Anyone have a guess as to how regularly the 40s are on Promo ? I have learned (the Hard Way) that sometimes you really have to Pounce on Costco Deals, because occasionally it’s a “one & done” occurrence.

    Also, these maintain Hot liquids up to 12hrs, whereas their siblings the HydroFlask are 6hrs. FWIW …

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