Flat Stainless Steel Water Bottle with Vacuum Insulated Double Wall Structure

Principles of Vacuum Insulated Flasks

A vacuum insulated flasks, commonly known as thermos, operates on several key principles to maintain the temperature of their contents. It has a lid that seals tightly, and the vacuum insulation layer helps slow down the heat transfer of the liquid inside, achieving the purpose of keeping it warm or cold.

Here are the main principles:

1. Sealed Structure:The body of the flask is designed with a double-layer sealed structure, where the vacuum between the inner and outer walls interrupts heat transfer. Since a vacuum does not conduct heat, it effectively eliminates the medium for thermal conduction. Additionally, A well-sealed lid prevents heat exchange through convection with the external environment, ensuring that the temperature of the contents remains stable for longer periods. Therefore, the sealing performance of the flask plays a crucial role in its insulation effectiveness. The better the seal, the more difficult it is for heat to transfer, resulting in improved insulation.

2. Materials:The material used for the outer wall, typically stainless steel, is chosen for its durability and insulation properties. In addition, the inner wall is usually made of reflective material like copper. This minimizes heat transfer through radiation by reflecting thermal radiation back into the liquid.

Why Are Vacuum Insulated Vessels Usually Round?

When pressure is applied, for a round bottle, the curved surface allows for uniform stress distribution. It spreads evenly across the entire surface, reducing the risk of deformation. That’s why water bottle is mostly cylindrical, enabling it withstanding huge pressure.

vacuum flask cross section

Difficulties of Making Flat or Rectangular Vacuum Insulated Flask

1. Technical challenges: As we have learned from above, stress is distributed across the surface, when pressure is applied. So for a flat or rectangular vacuum insulated vessel, stress will concentrate at corners or edges, leading to potential failure points. Forces applied to these areas may result in buckling or cracking more easily than in round designs.
2. Higher cost: Under air pressure, the inner and outer walls of flat insulated thermoses may deform over time and eventually fit together. To prevent this deformation, the thickness of both walls must be significantly increased. This results in needing more materials, which substantially raises the cost and weight of the product.
3. Manufacturing complexity: The manufacturing process for round bottles is mature and well-established, whereas molds and equipment for flat water bottles are far less accessible. To produce flat water jugs, it requires more time and expenses in design and testing to ensure insulation and portability.

Why is KingStar Able to Produce Flat Vacuum Insulated Flask?

As a leading expert in manufacturing wholesale stainless steel water bottles, KingStar never settles for current achievements. We continuously innovate and remain at the forefront of industry trends. With a strong team and core values, KingStar is able to produce flat double-walled water bottles that meet your needs.

1. Professional design team: Our dedicated team works tirelessly to create water bottles that are both functional and modern. With mature technology and over 20 years of experience, KingStar has tackled many problems during manufacturing. Thanks to our highly skilled design team, KingStar can manufacture flat or rectangular vacuum mugs/ water bottles/ flasks/ jugs/ wine bottles/ food containers featuring a double-walled structure. We ensure our products are of high quality and aesthetically pleasing, all while keeping our unit prices at a reasonable level.
2. Quality control: All items are strictly designed to meet global quality standards: RoHS, FDA, LFGB, Prop65. KingStar strictly controls every single step of our manufacturing process. Every product is checked in multiple rounds to ensure flat water bottles’ high-performance quality.

Why Choose KingStar Flat Stainless Steel Water Mug?

Nowadays, square water bottles have become increasingly popular. More and more people are attracted to flat cups because of their modern and sleek appearance. As a substitute of traditional round water jugs, flat mugs have captured many customers’ eyes, especially for those who are looking for innovation and modernity.

Conclusion

In conclusion, flat stainless steel water bottles/ coffee cups/ mugs/ thermoses/ flasks with double wall insulation, as an alternative to traditional round water bottles, are an innovative and modern way of hydration. With their sleek design and exceptional functionality, more and more young people are choosing them for their stylish aesthetics, portability, safety, great insulation, and convenience.

As a mature wholesale stainless steel water bottle manufacturer, KingStar has the expertise in making both traditional round and flat cups with rich experience and excellent skills. We are devoted in making square insulated mugs that are not only functional, but also visually appealing and stylish. Additionally, KingStar provides various customization services from colors to sizes to materials, ensuring to match our clients’ specific needs. If you have any questions, feel free to contact us by sending us messages online or via email to sales@waterbottle.tech. We will respond within 24 hours.