316 Vacuum Flask
For those seeking the ultimate combination of durability, purity, and temperature retention, the 316 Vacuum Flask represents the pinnacle of insulated drinkware technology. Engineered with premium 316 surgical-grade stainless steel, these flasks offer superior corrosion resistance compared to common 304 stainless steel, ensuring your beverages taste exactly as intended, free from any metallic aftertaste. This makes them an indispensable companion for a wide range of activities. Whether you're heading to the office, embarking on a multi-day hiking trip, or simply running errands, there's a perfect model for your needs. For everyday hydration, the compact 316 Flask 500ml is ideal. If you require more capacity for longer days, the 316 Flask 750ml provides ample volume without being cumbersome. Our rugged 316 Outdoor Flask is built to withstand the rigors of the trail, while the convenient 316 Car Flask is designed with features perfect for keeping your drink at the right temperature during commutes or road trips. All models feature advanced double-wall vacuum insulation, a leak-proof design, and a user-friendly wide mouth for easy filling and cleaning.
The core of the **316 Vacuum Flask**'s exceptional performance lies in its meticulous construction and high-grade materials. The interior is crafted entirely from 316 stainless steel, a material known for its high molybdenum content, which grants it enhanced resistance to pitting and corrosion from chlorides, acids, and saltwater. This makes it exceptionally safe for storing everything from water and coffee to acidic juices and sports drinks. The vacuum-sealed layer between the inner and outer walls is the key to its industry-leading insulation, virtually eliminating heat transfer through conduction or convection. Every component is designed with precision, from the durable, BPA-free lid with its secure locking mechanism to the non-slip powder-coated base that protects surfaces. The **316 Vacuum Flask** is not just a container; it's a meticulously engineered system designed to maintain your beverage's ideal temperature for hours, ensuring every sip is perfect.
316 Vacuum Flask: Technical Specifications & Performance Data
Below is a detailed breakdown of the key features and materials that define the quality of our flask series.
- Primary Material: 316 Surgical-Grade Stainless Steel (Inner & Outer Wall)
- Insulation Technology: Double-Wall High Vacuum Insulation
- Interior Finish: Mirror Polished, Non-Toxic, Corrosion-Resistant
- Exterior Finish: Durable Matte or Powder-Coated Options
- Lid Material: BPA-Free, Food-Grade Plastic with Stainless Steel Threads
- Seal: Silicone Gasket for 100% Leak-Proof Guarantee
- Mouth Opening: Wide Mouth (48mm) for Easy Filling, Drinking, and Cleaning
- Safety Base: Non-Slip, Scratch-Resistant Coating
| Model |
Capacity |
Height |
Diameter |
Weight (Empty) |
Hot Retention (≥95°C) |
Cold Retention (≤4°C) |
| 316 Flask 500ml |
500 ml / 16.9 oz |
22.5 cm / 8.85 in |
7.4 cm / 2.91 in |
310 g / 0.68 lbs |
12 hours |
24 hours |
| 316 Flask 750ml |
750 ml / 25.4 oz |
27.8 cm / 10.94 in |
7.8 cm / 3.07 in |
420 g / 0.93 lbs |
12 hours |
24 hours |
| 316 Outdoor Flask |
1000 ml / 33.8 oz |
29.0 cm / 11.42 in |
8.5 cm / 3.35 in |
550 g / 1.21 lbs |
14 hours |
36 hours |
| 316 Car Flask |
450 ml / 15.2 oz |
20.0 cm / 7.87 in |
7.0 cm / 2.76 in |
280 g / 0.62 lbs |
10 hours |
20 hours |
Note: Temperature retention times are based on laboratory testing under controlled conditions with the flask pre-chilled or pre-heated and the lid securely closed. Actual performance may vary slightly with ambient conditions and usage.
