Leakproof Stainless Flask

Discover the ultimate companion for your daily hydration needs with our premium Leakproof Stainless Flask. Engineered for durability and everyday reliability, this flask is designed to keep your beverages at the perfect temperature for hours. Whether you're commuting to work, hiking a mountain trail, or simply working at your desk, you need a flask you can trust. Our vacuum insulation technology ensures your coffee stays piping hot or your water stays refreshingly cold, no matter the environment. For those seeking the classic standard of food-grade safety, our 304 Stainless Vacuum Flask offers excellent corrosion resistance. If you require superior durability for demanding conditions, especially against salt and chlorides, our upgraded 316 Stainless Vacuum Flask is the ideal choice. We offer versatile sizes to fit every lifestyle; the compact 500ml Stainless Flask is perfect for short trips or a single serving, while the generous 750ml Stainless Flask ensures you have ample hydration for longer adventures or a full day's supply.

The Leakproof Stainless Flask is built with precision and user experience in mind. Every component, from the threaded lid to the reinforced base, is designed to create a perfect seal and withstand daily use. We understand that a water bottle is more than just a container; it's an essential tool for your active life. That's why the Leakproof Stainless Flask features a one-handed, push-button lid for easy access, a comfortable non-slip grip, and a wide mouth for effortless filling and cleaning. Its sleek, minimalist design looks great in any setting, from the gym to the office. Forget about lukewarm drinks and inconvenient spills. The Leakproof Stainless Flask combines advanced thermal performance with rugged, dependable construction to deliver a hydration solution that simply works, day in and day out.

Leakproof Stainless Flask: Core Specifications

Material: Premium 18/8 Stainless Steel (304 Grade) or 316 Marine-Grade Stainless Steel
Insulation: Double-Wall Vacuum Insulation
Lid Type: Screw-on, Leak-Proof Flip Lid with Push-Button Open
Temperature Retention: Keeps drinks hot for up to 12 hours and cold for up to 24 hours
Exterior Finish: Brushed Stainless Steel or Powder-Coated Color Options
Compatibility: Dishwasher safe (top rack recommended); BPA-Free

Detailed Product Parameters

Model	Capacity	Height (with lid)	Diameter	Weight (empty)	Warranty
LSF-500	500ml (16.9 fl oz)	23 cm / 9.1 in	7 cm / 2.8 in	280 g / 9.9 oz	5 Years
LSF-750	750ml (25.4 fl oz)	27.5 cm / 10.8 in	7.8 cm / 3.1 in	380 g / 13.4 oz	5 Years
LSF-500 Pro (316)	500ml (16.9 fl oz)	23 cm / 9.1 in	7 cm / 2.8 in	290 g / 10.2 oz	Lifetime
LSF-750 Pro (316)	750ml (25.4 fl oz)	27.5 cm / 10.8 in	7.8 cm / 3.1 in	390 g / 13.8 oz	Lifetime

Hot Products

200ml Mini Portable Vacuum Flask
200ml Mini Portable Vacuum Flask manufactured by Yongkang Jianyang Metals Co., Ltd. Features SUS304 double-wall vacuum insulation, 12-hour hot/24-hour cold temperature stability, and a leak-proof seal. Specifications support OEM/ODM custom branding, color coatings, and packaging. Factory certified under BSCI, SEDEX, and ISO9001.
304 Stainless Steel Water Bottle
Jianyang Fashion 304 Stainless Steel Water Bottle has a light blue polka dot style, which is very fresh and eye-catching, and there is also a solid color series to choose from. The company has been deeply involved in cup and pot manufacturing for 15 years, with an annual shipment volume of over 2 million pieces. The products have passed FDA and LFGB international certifications and are exported to markets in Europe, America, and Southeast Asia. Their quality and service have earned the trust of global customers.
Auto Vacuum Mug
Drink freely without spilling easily. This insulated and leak proof Auto Vacuum Mug can help you solve your thirst and water problems no matter where you are. Simply lightly press the sealing cover upwards to enjoy the drink, and then press downwards to prevent water leakage. Do you like to drink with a straw? Simply insert the straw into our water bottle and it will automatically close the opening for easy drinking. After drinking, remove the straw and the opening will automatically seal to prevent spillage. Made of BPA and lead free materials, allowing you to drink with peace of mind; Welcome to purchase our thermos bottle series products
Camping Water Bottle
Due to the fact that plastic takes many years to decompose, it will continue to accumulate. Therefore, the high-quality Camping water bottle produced by Jianyang can replace this type of plastic bottle. Currently, plastic accounts for nearly 70% of the total marine waste and 80% of the total land waste. However, there is also good news: solving this problem is actually very simple, just replace disposable plastic bottles with reusable water bottles. Everyone has a love for the environment, so if you need to customize your own water bottle, you can come to us!
Inox Coffee Pot
The inox coffee pot is produced by Jianyang factory, which has many years of experience in manufacturing insulated vessels, and has a complete supply chain system and quality control process. From raw material procurement to finished product delivery, multiple testing standards are passed, supporting small batch customization and rapid sampling to meet the personalized needs of customers from different channels. The factory is equipped with automated production lines and a professional quality inspection team to ensure that every product meets industry-leading standards in appearance, functionality, and safety.
Italian Coffee Maker Stainless Steel
When small families, office workers, and student groups need an Italian coffee maker stainless steel, Jiang Yang's lightweight and portable thermos with a golden capacity is perfect. It features a stainless steel brushed body, black heat-resistant handle, and press type lid, creating a simple and modern style that is suitable for various scenarios such as kitchens, desks, cars, and camping. If you need other color combinations, you can come to me!

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Leakproof Stainless Flask