English
Home > Products > 650ml Isothermal Flask

650ml Isothermal Flask

Discover the ultimate companion for keeping your beverages at the perfect temperature—the 650ml Isothermal Flask. Whether you need to enjoy a hot coffee during a morning commute or keep drinks chilled on a sunny day, this flask delivers reliable performance. With a focus on superior insulation technology, it's built for those who value convenience and quality. If you require more capacity, consider our spacious 1.3L Isothermal Flask, ideal for larger gatherings or longer trips. Additionally, for households concerned with safety and purity, our Food-Grade Isothermal Flask ensures all materials meet stringent health standards. Planning an outdoor adventure? The Picnic Isothermal Flask offers durable, portable designs perfect for picnics, hikes, and more. Not to forget, the classic Isothermal Flask remains a staple for everyday use, guaranteeing your drinks stay fresh for hours.


The 650ml Isothermal Flask features a double-wall vacuum-insulated construction that minimizes heat transfer, maintaining temperatures for up to 12 hours for hot liquids and 24 hours for cold ones. Crafted from high-quality, BPA-free stainless steel, it's both durable and safe for repeated use. The wide mouth design allows for easy filling and cleaning, while the leak-proof screw cap ensures no spills during transport. Weighing only 450 grams, it's lightweight and easy to carry, making it a practical choice for busy lifestyles. The sleek, ergonomic exterior is available in multiple finishes, including matte black, brushed silver, and navy blue, to suit various preferences. Additionally, the flask includes a convenient carry handle and is dishwasher-safe for effortless maintenance. Engineered to resist dents and corrosion, the 650ml Isothermal Flask stands up to daily wear and tear while delivering consistent thermal performance. It's perfect for office use, travel, or outdoor activities, providing reliable temperature control whenever you need it. Below is a detailed specification table for quick reference.

  • Capacity: 650 milliliters
  • Material: 304 Stainless Steel (BPA-Free)
  • Insulation Type: Double-Wall Vacuum
  • Heat Retention: Up to 12 hours
  • Cold Retention: Up to 24 hours
  • Weight: 450 grams
  • Dimensions: 22 cm height, 8 cm diameter
  • Lid Type: Screw Cap with Silicone Seal
  • Color Options: Matte Black, Brushed Silver, Navy Blue
  • Dishwasher Safe: Yes
  • Warranty: 2 Years
Feature Specification
Capacity 650 ml
Material 304 Food-Grade Stainless Steel
Insulation Double-Wall Vacuum
Hot Retention Up to 12 hours
Cold Retention Up to 24 hours
Weight 450 g
Dimensions (H x D) 22 cm x 8 cm
Lid Type Screw Cap with Leak-Proof Seal
Color Variants Matte Black, Brushed Silver, Navy Blue
Cleaning Dishwasher Safe
Warranty Period 2 Years

Related Products

Hot Products

  • Travel Insulated Tea Kettle Portable

    Travel Insulated Tea Kettle Portable

    1.2L 1.6L 2L 3L 4L 5.2L stainless steel travel insulated tea kettle portable, keep warm 24 hours, keep colder 28 hours. Made from Kudike brand, who is the factory in water bottle industry. We have ability to production hurry order and can keep first-class quality. Look forward to hear your new through the mail.
  • 30oz Stainless Steel Mug

    30oz Stainless Steel Mug

    Kudike's exquisite and durable 30oz stainless steel mugs are perfect for you to enjoy your own drinks anytime, anywhere! We have invested in customized equipment (such as robotic arms) to achieve faster and more stable production of stainless steel insulated cups. So you don't need to worry about the delivery time of large quantities of thermos bottles! This product is made of 18/8 food grade stainless steel and features a double-layer vacuum insulation design. It can maintain heat for up to 6 hours and cool for up to 24 hours (the cup body does not condense water droplets!).
  • 40oz Tumbler with Lid

    40oz Tumbler with Lid

    KudiKe quencher flip straw with handle tumbler, 40oz, big capacity.
    40oz Tumbler with Lid has new design lids, more fasion.
    Free sample, contact us to open the huge market.
  • Insulated Bottle

    Insulated Bottle

    Kudike is a brand of stainless steel insulated bottle. Insulated bottle is double wall, 550ml, food grade and eco-friendly bottle.
    Quality is the basis of our decision to cooperate, and we look forward to working with you with the same philosophy.
  • 40oz Water Bottle with Straw

    40oz Water Bottle with Straw

    We are the factory of 40oz water bottle with straw. We production high quality stainless steel tumbler with subtle details.
    We are looking for the partner who is sale in stainless steel bottle industry.
  • Isothermal Flask

    Isothermal Flask

    480ml Stainless steel isothermal flask, production by Yongkang Jiangzhi Cup Industry Co., Ltd. Our factory main production high quality bottles. Contact us, for long time cooperation for mutual benefits in the days to come.
  • Related Blog
  • Reviews

  • Is Your Water Flask as Durable and Leak-Proof as This

    I’ve been carrying the same Water Flask in my backpack for three years now. It’s been dropped on hiking trails, kicked under airplane seats, and has faithfully stood upright in my bag every single day. That simple question in the title isn’t just a marketing line—it’s the core of what we, at Kudike, believe a product should deliver: absolute reliability. Most of us have experienced the moment of panic, tipping a bag over only to find a puddle and a ruined laptop.

  • The 2025 FINA Championships in Singapore with us

    The Singapore Swimming World Championships concluded on the evening of the 3rd, and the water ripples gradually subsided. During the eight-day "pool battle", three world records were broken, and swimmers from various countries wrote pool legends of this summer both on and off the field.

  • Are you still using stainless steel as your drinking cup?

    A new product is now available. This is a large-capacity travel kettle. The body of the kettle is made of pure titanium, with a titanium content as high as 99.8%.

  • What Is the Difference Between a Flask and a Water Bottle?

    When it comes to carrying beverages on the go, flasks and water bottles are two common options.

  • Which Tumbler Is Best For Hot And Cold Beverages

    As someone who has evaluated countless consumer products over my two-decade career, I understand the struggle of finding a Tumbler that truly performs. We’ve all been there—your coffee turns lukewarm too soon, or your iced drink becomes watery within an hour. So which Tumbler actually keeps beverages at the right temperature for hours?

  • To Make a Thermos Cup, It Is Not Only Necessary to Have a Beautiful Appearance, But Also to Be Well-Rounded Both Inside and Out

    Half of 2025 has passed. During this period, we have produced a total of 3.6 million stainless steel insulated cups, which have been sold globally. Among them, Chinese gift orders account for 40%, the United States for 10%, Europe for 25%, Japan and South Korea for 10%, and other regions for 15%.

Send Inquiry

Hit enter to search or ESC to close
X
We use cookies to offer you a better browsing experience, analyze site traffic and personalize content. By using this site, you agree to our use of cookies. Privacy Policy
Reject Accept