GoKawiilCNET tests Coldest water bottle's 36-hour cold claim against Owala
CNET compared the Shark Tank-featured Coldest water bottle to a standard Owala bottle, filling each with equal water and ice and tracking temperature with a meat thermometer over 36 hours. Early readings showed Owala consistently running a couple degrees colder than Coldest, with both bottles still delivering chilled water as the test progressed from 52°F to 60°F by the 24-hour mark.
GoKawiil's interpretation of the reporting above, not reported fact.
The side-by-side test suggests Coldest's 36-hour cold claim may be achievable but not necessarily superior to cheaper competitors, which could matter to consumers weighing insulated bottle purchases based on marketing claims rather than independent verification. It also reflects a broader trend of hydration brands competing on insulation performance following Stanley's viral popularity.
- Coldest, a Naples, Florida-based brand featured on Shark Tank, claims its bottles keep drinks cold for 36 hours.
- In CNET's informal test, a $30 Owala bottle stayed slightly colder than Coldest at every measured interval up to 24 hours.
- The test lacked a fully controlled environment since the two bottles differ in size and shape, affecting ice-to-water ratios.
Coldest Water Bottle 36oz — This is the very bottle put to the test in the article, boasting serious insulation tech that claims to keep drinks cold for up to 36 hours. It's a great pick if you're curious whether the Shark Tank hype holds up in your own daily routine, especially if you want something sturdier than the typical tumbler.
See Coldest Water Bottle 36oz on Amazon → Affiliate link — we may earn a commission on purchases, at no extra cost to you. Product picked by AI based on this article; it is not a tested recommendation.Source: cnet.com — David Watsky, 2026-10-15
Published there as: “Can the Shark Tank Water Bottle Really Keep Drinks Cold for 36 Hours? I Tested One to Find Out”
Read the original report → The summary and analysis above are GoKawiil's own, written from reporting by the source above. Facts and quotes belong to the original publisher.