Capacity: 1000ml/33oz

Size/weight: 8.1×10.3×19.8cm/595g

Carton: 45.2×34×22.cm/0.034m³

QTY: 24pcs

N.W./G.W.: 14.3/15.8kgs

As lifestyles become increasingly mobile, professionals and families alike require food storage solutions that combine convenience, durability, and temperature retention. The Food Jar & Vacuum Pot Double Layer meets these demands by integrating stainless steel double-wall construction, a large-capacity container, and an ergonomically designed black top handle with a secure screw lid. This design ensures that both food and beverages remain at the desired temperature for extended periods, making it ideal for picnics, travel, or office lunches.

This article explores the core concepts, structural and material design, manufacturing processes, critical quality factors, supplier considerations, industry challenges, practical use cases, and emerging trends related to double-wall stainless steel food containers.

Core Concepts and Key Technologies

Double-Wall Vacuum Insulation

The primary technology underlying the Food Jar is double-wall vacuum insulation, which significantly reduces heat transfer via conduction, convection, and radiation:

Conduction: Stainless steel walls minimize direct heat flow.

Convection: Vacuum between walls prevents circulating air from transferring heat.

Radiation: Reflective inner surfaces reduce thermal radiation loss.

This combination allows hot foods to remain warm and cold items to stay chilled for extended periods, supporting flexible eating schedules and outdoor activities.

Thermal Retention Dynamics

The effectiveness of vacuum-Insulated Food Jars is influenced by wall thickness, vacuum quality, and lid sealing integrity:

Wall Thickness: Thicker walls can enhance thermal retention but may increase weight.

Vacuum Quality: A consistent vacuum eliminates convective heat transfer.

Lid Integrity: Screw lids with silicone seals reduce heat loss and prevent leaks.

Portability and Ergonomics

The black top handle and compact cylindrical shape make it easy to carry, even fully loaded. This ergonomic design allows for safe and convenient handling during commutes, picnics, or short travels.

Product Structure, Performance, and Materials

Container Body

Material: High-grade 18/8 stainless steel, offering corrosion resistance, durability, and food safety compliance.

Inner Surface: Polished, food-grade finish minimizes bacterial growth and allows easy cleaning.

Outer Surface: Powder-coated or brushed finish, providing grip, aesthetics, and scratch resistance.

Capacity: Typically ranging from 500ml to 1L, balancing volume with portability.

Lid Assembly

Material: BPA-free plastic with integrated silicone gasket for leakproof sealing.

Screw Mechanism: Ensures tight closure, reducing thermal loss and spill risk.

Top Handle: Ergonomically molded for comfortable one-handed carrying, enhancing portability.

Double-Layer Construction

Inner and Outer Walls: Stainless steel layers separated by vacuum.

Vacuum Gap: Minimizes conduction and convection.

Reflective Coating (Optional): Some models incorporate reflective surfaces to enhance thermal retention.

Manufacturing Process

Deep Drawing or Stamping: Produces uniform stainless steel walls.

Polishing and Surface Treatment: Ensures food safety, aesthetic appeal, and corrosion resistance.

Vacuum Sealing: Creates a high-quality vacuum between inner and outer walls.

Assembly: Screw lid, handle, and silicone gasket are precisely fitted.

Quality Testing: Leak tests, drop resistance, thermal retention assessment, and ergonomic validation.

Critical Factors Affecting Quality and Performance

Material Quality

High-grade 18/8 stainless steel resists rust, corrosion, and pitting.

Properly polished inner surfaces reduce bacterial growth and ease cleaning.

Lid Reliability

Silicone gaskets must maintain elasticity for repeated opening and closing.

Screw threads require precision machining to prevent leaks.

Vacuum Efficiency

Inconsistent vacuum can compromise thermal retention.

Manufacturing precision ensures a durable vacuum layer.

Ergonomics and Portability

Handle design must support full capacity weight.

Bottle diameter must fit common travel bags and lunch carriers.

Thermal Retention

Effective retention depends on wall thickness, vacuum quality, and lid integrity.

Continuous insulation testing ensures performance under real-world conditions.

Supply Chain and Supplier Considerations

Technical Capabilities

Experience in vacuum insulation technology.

Precision stainless steel fabrication and surface finishing.

Expertise in leakproof lid assembly and ergonomic handle integration.

Regulatory Compliance

Food-grade stainless steel (FDA/EU certified).

BPA-free, non-toxic plastics for lids.

Heavy metal testing for coatings and gaskets.

Production Reliability

Consistent vacuum quality across batches.

Lid assembly tolerances verified for leak prevention.

Scalable manufacturing for B2B office, retail, and outdoor supply channels.

Industry Pain Points

Breakage and Durability

Stainless steel is durable, but vacuum layer integrity must be maintained.

Mishandling or sharp impacts can compromise insulation or deform outer walls.

Leak Prevention

Improper gasket seating or thread defects may result in leaks.

Consistent testing is required to maintain trust in B2B markets.

Thermal Retention Limitations

Extended retention for hot liquids may require supplementary insulating layers.

Lid design and seal quality directly influence performance.

Cleaning and Maintenance

Lids must be fully removable for thorough cleaning.

Vacuum layer prevents disassembly, so surface cleaning must be simple and effective.

Applications and Use Cases

Office Lunch

Ideal for hot soups, pasta, or beverages, preserving temperature until lunchtime.

Compact design fits under desk storage or bag compartments.

Screw lid ensures no spills near electronics or paperwork.

Outdoor Activities

Picnics, hiking, or day trips benefit from its portable handle and leakproof design.

Large capacity accommodates multiple servings or shared meals.

Travel

Lightweight yet sturdy for commuting or long-distance trips.

Maintains beverage or food temperatures for hours without refrigeration.

Corporate Gifting

Modern designs and vibrant finishes make them ideal for promotional or corporate gifting, combining utility with brand aesthetics.

Current Trends and Future Development

Health and Safety Compliance

Increasing focus on BPA-free and heavy-metal-free components.

Food safety certifications are essential for international B2B clients.

Design Innovations

Vibrant color finishes and ergonomic handles enhance user appeal.

Modular lids or integrated compartments for snacks or condiments are emerging.

Thermal Efficiency Improvements

Advanced vacuum technologies for extended temperature retention.

Double-wall and triple-layer options for specialized use cases.

Sustainability

Stainless steel and reusable gaskets reduce single-use plastic consumption.

Eco-friendly manufacturing processes and recyclable packaging are gaining preference.

Frequently Asked Questions (FAQ)

Q1: How long can the food jar maintain temperature?

Depending on capacity and insulation, hot or cold foods can retain optimal temperature for 6–12 hours.

Q2: Is it leakproof when fully packed?

Yes, properly sealed screw lid with silicone gasket prevents leaks under normal use.

Q3: Is it suitable for outdoor travel?

Yes, compact shape, top handle, and durable construction make it ideal for commuting, picnics, and travel.

Q4: How easy is it to clean?

Removable lids and smooth stainless steel interiors allow thorough cleaning without special tools.

Conclusion

The Food Jar & Vacuum Pot Double Layer combines large-capacity stainless steel construction, ergonomic handle, leakproof screw lid, and double-wall vacuum insulation to deliver a premium on-the-go food storage solution. It meets the key requirements of B2B buyers, office professionals, and outdoor enthusiasts: durability, thermal retention, portability, and style.

By focusing on material integrity, precise lid engineering, vacuum efficiency, and supplier reliability, businesses can provide customers with a reliable, aesthetically appealing thermal food solution. As trends move towards health, sustainability, and modular design, double-wall stainless steel food jars continue to set standards for practical, high-performance, and visually appealing food containers.