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316 Stainless Vacuum Flask

When it comes to reliable thermal performance and superior durability, the 316 Stainless Vacuum Flask stands in a class of its own. Engineered for adventurers, commuters, and everyday users who demand excellence, this flask is the pinnacle of beverage container technology. While many are familiar with the standard 304 Stainless Vacuum Flask, our premium model utilizes 316-grade stainless steel, offering enhanced resistance to corrosion and pitting, especially from chlorides and saline environments—making it ideal for coastal trips or sporting activities. Whether you need a compact companion for your daily commute or a robust vessel for extended adventures, we offer versatile sizes to suit every need. Our popular 500ml Stainless Flask is perfect for a personal hydration boost, while the larger 750ml Stainless Flask ensures you have ample hot coffee or cold water for longer days. Built to withstand the rigors of the great outdoors, this flask is the definitive choice for anyone seeking a dependable Outdoor Stainless Flask that performs flawlessly in any condition.


The construction of the 316 Stainless Vacuum Flask begins with its core material. Type 316 stainless steel contains molybdenum, an element that significantly boosts its anti-corrosive properties compared to other alloys. This makes it exceptionally resistant to saltwater, acids, and industrial chemicals, ensuring the interior remains pristine and the taste of your drink pure. The advanced vacuum insulation technology involves creating a near-perfect vacuum between two walls of stainless steel, virtually eliminating heat transfer through conduction and convection. This engineering marvel is what allows the 316 Stainless Vacuum Flask to keep beverages hot for up to 12 hours and cold for an impressive 24 hours. Every component, from the precision-threaded, leak-proof cap to the ergonomically designed wide mouth for easy filling and cleaning, is crafted with user convenience and longevity in mind. The exterior features a durable, sweat-proof powder coating that provides a secure grip and comes in a range of finishes to match your personal style.

Key Features of the 316 Stainless Vacuum Flask

  • Premium 316-Grade Stainless Steel Interior & Exterior
  • Advanced Double-Wall Vacuum Insulation
  • Keeps Liquids Hot for 12 Hours / Cold for 24 Hours
  • Leak-Proof, Screw-On Lid with Precision Threading
  • Sweat-Proof Exterior Coating
  • Wide Mouth Opening for Easy Cleaning and Ice Cubes
  • BPA-Free, Food-Safe Materials
  • Dishwasher Safe for Easy Maintenance

Technical Specifications

Specification Detail
Primary Material 316 Stainless Steel
Insulation Type Double-Wall Vacuum
Capacity (Available) 500ml, 750ml, 1L
Hot Retention (≥90°C) 12 Hours
Cold Retention (≤10°C) 24 Hours
Lid Material BPA-Free PP / Stainless Steel
Product Height (500ml) 23 cm
Product Diameter (500ml) 7.5 cm
Weight (Empty, 500ml) 380 grams

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