Head-to-head · Best Insulated Water Bottles

Owala FreeSip Insulated Stainless Steel 24 oz vs ThermoFlask Double Wall Vacuum Insulated 32 oz

Which is the better buy? Side-by-side on rating, price, strengths, and watch-outs — with the published ratings we averaged to get there.

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The short answer

ThermoFlask Double Wall Vacuum Insulated 32 oz comes out ahead by a clear margin (4.3 vs 4.8). The gap is mostly about budget-conscious users prioritizing convenience — read the strengths below before deciding.

Ranked #5 in Best Insulated Water Bottles

Owala FreeSip Insulated Stainless Steel 24 oz

4.3

4 sources2 derived$29.97as of Aug 1

Owala's FreeSip Water Bottle lets you sip through a straw or swig from the spout without unscrewing anything. Pack Hacker and Serious Eats both reviewed it and praised the durability, the cold retention, and the convenient design. The body is stainless steel with a soft plastic cap layer; it cleans easily, though reviewers noted the plastic part can show blemishes over time. It suits anyone who wants a leakproof insulated bottle that drinks two ways.

Strengths

— Provides both sip and swig drinking options without unscrewing or switching caps
— Keeps drinks cold for up to 24 hours with ice cubes
— Durable stainless steel construction with a matte finish

Watch-outs

— Soft plastic cap layer may be prone to blemishes over time
— Some parts can be hard to take apart for cleaning
— Taking a swig from two outlets feels strange at first

$29.97 · Check Price on Amazon Full review →

Higher ratedRanked #1 in Best Insulated Water Bottles

ThermoFlask Double Wall Vacuum Insulated 32 oz

4.8

2 sourcesall derived$28.99as of Jul 31

The ThermoFlask 32 oz insulated tumbler holds temperature reliably, with double-wall vacuum insulation keeping beverages cold for up to 24 hours. Costco reviewers point to its durability, the fact that it's dishwasher safe, and that it fits a cup holder. It's built from 18/8 food grade stainless steel with a wide mouth lid that's easy to clean and fill. Reviewers rate the performance and convenience but note it's made in China and includes only standard Tritan straws, with no alternative materials.

Strengths

— Double-wall vacuum insulation keeps drinks ice cold for up to 24 hours
— BPA-free 18/8 food grade stainless steel construction
— Dishwasher safe for easy cleaning

Watch-outs

— Made in China according to product details
— Includes only standard reusable Tritan straws, not silicone or metal options

$28.99 · Check Price on Amazon Full review →

Derived means the reviewer published no score, so one was inferred from their written verdict. Everything else is a number the publisher printed. How we rank.

How they stack up

Owala FreeSip Insulated Stainless Steel 24 oz

The Owala FreeSip uniquely offers both sip and swig drinking without switching caps, a feature absent in the Hydro Flask and ThermoFlask. While it provides good insulation, it's less durable than the YETI Rambler and lacks the 32 oz capacity of the Klean Kanteen and Simple Modern. Unlike the Iron Flask, it doesn't offer interchangeable lids, and its plastic cap layer may degrade over time, making it less ideal for heavy use compared to the more robust Stanley or Yeti options.

ThermoFlask Double Wall Vacuum Insulated 32 oz

The ThermoFlask offers excellent dishwasher safety and cup holder compatibility, features not found in the Iron Flask or Simple Modern. It provides good insulation comparable to the Klean Kanteen and Simple Modern, but lacks the eco-friendly recycled materials of the Klean Kanteen and the versatile lid options of the Hydro Flask. Unlike the YETI Rambler, it's more affordable but less durable, and it doesn't offer the dual-drinking functionality of the Owala FreeSip.

Specs side-by-side

Spec	Owala FreeSip Insulated Stainless Steel 24 oz	ThermoFlask Double Wall Vacuum Insulated 32 oz
Capacity	24 oz	32 oz.
Material	Stainless Steel, Plastic	18/8 food grade stainless steel
Insulation	Vacuum	Double wall vacuum
Weight	0.95 lb	—
Lid Type	2-in-1 lid lets you sip or swig	screw on wide mouth lid
Brand	Owala	ThermoFlask
Cold Retention	—	up to 24 hours

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