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STANLEY Classic Thermal Flask: Keeps drinks hot for 40 hours

Stanley Classic Legendary Thermal Flask 1.4L - Keeps Hot Or Cold for 40 Hours - BPA-Free Insulated Bottle - Leakproof - Dishwasher Safe - Green
4.6
[Superior Insulation]  Keeps drinks hot 40 hours, cold 35 hours; ice stays frozen up to 6 days.
[Leakproof Multi-Use Lid]  Leak-resistant lid doubles as a cup with a wide mouth for easy pouring.
[Dishwasher Safe]  All stainless-steel components are dishwasher safe for effortless cleaning.
[Multiple Capacity Options]  Available in sizes from 0.47L to 2.3L to suit different needs.
[Built For Life Guarantee]  Rugged, high-performance design since 1913 that reduces single-use disposables.
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Outdoor drinkware that promises long-lasting thermal performance for travel, work and weekends away. Peace of mind for anyone who wants hot coffee or icy water available throughout the day. Is the STANLEY Classic Thermal Flask the one bottle that replaces single-use cups and bottles?

⚡ At a Glance
  • Insulation Performance: Keeps drinks hot for 40 hours, cold for 35 hours, ice up to 6 days
  • Best for: Commuters, hikers and anyone needing reliable long-duration drink temperature control
  • Not ideal for: Those who need compact, pocket-sized bottles for very short trips

Superior vacuum insulation preserves temperature for exceptionally long periods. Leak-resistant lid and dishwasher-safe stainless steel simplify everyday use.


Coffee Stays Hot for Hours – Thanks to vacuum insulation

A vacuum barrier between the inner and outer walls limits heat transfer, slowing warming or cooling of the contents. The design reduces conduction and convection that normally equalise temperature.

Hot drinks remain at a usable temperature during long journeys and full workdays, removing the need to reheat. Cold drinks stay refreshing for multi-day outings when packed with ice.

No-Drip Pouring and On-the-Go Drinking – With a leak-resistant lid and wide mouth

A leak-resistant screw lid prevents accidental spills while the wide mouth allows easy pouring and accepts ice cubes; the lid converts into a cup for drinking.

Pack in a rucksack without worrying about wet kit, pour directly into the lid for a quick drink, and use the lid as a cup at rest stops.

Easy Cleaning and Durable Construction – With dishwasher-safe stainless steel parts

Every removable component is designed to be dishwasher safe, and the flask is made from BPA-free stainless steel for long-term hygiene and resilience.

Fast, hygienic cleaning after trips reduces maintenance time and supports repeated reuse, while robust materials stand up to outdoor knocks.

✨ The 4 Key Reasons for STANLEY Classic Thermal Flask
  1. 1.4L capacity – Holds enough for two travel mugs of coffee comfortably
  2. Wide mouth and cup lid – Makes pouring simple and the lid doubles as a cup
  3. Dishwasher-safe parts – Cleans quickly in the dishwasher, no hand washing required
  4. Built For Life durability – Designed to replace disposables and last through heavy outdoor use
📋 Technical Details at a Glance
  • Capacity: 1.4L
  • Keeps Hot: Up to 40 hours
  • Keeps Cold: Up to 35 hours (ice up to 6 days)
  • Material: Stainless steel
  • Lid: Leak-resistant lid; lid doubles as a cup; wide mouth for pouring
❓ Frequently Asked Questions

Q: How long will drinks stay hot or cold in the flask?

A: Hot drinks remain hot for up to 40 hours and cold drinks up to 35 hours, with ice lasting up to six days when packed correctly.

Q: Is the lid truly leak-resistant for travel?

A: The lid is designed to be leak-resistant, allowing the flask to be carried in a backpack without worrying about spills; user reviews confirm clean pouring without dribbling.

Q: Can I clean the flask in a dishwasher?

A: Yes, every piece of the stainless steel vacuum bottle is dishwasher safe for straightforward cleaning.

🏆 Our Verdict

Ideal for commuters, walkers and weekend adventurers who need dependable temperature control and low-maintenance gear. Exceptional vacuum insulation combined with a leak-resistant lid and dishwasher-safe construction is the core advantage. Durable materials and the Built For Life ethos mean long-term reuse and fewer disposable bottles over time.