Capacity: 300ml/10oz

Size/weight: 8×8.3×9.15cm/230g

Carton: 56×38×13/0.028m³

QTY: 24pcs

N.W./G.W.: 5.5/7.0kgs

With modern lifestyles becoming increasingly mobile, there is a growing need for compact, efficient, and reliable food storage solutions that maintain temperature and hygiene. The Stainless Steel Thermal Vacuum Food Container 300ml Food Jar with Lids is specifically designed to meet these requirements. Its double-wall stainless steel construction, large capacity relative to its compact size, portable handle, and secure lid system makes it an ideal solution for picnics, office meals, commuting, or travel. Its vibrant yet functional design ensures practical thermal retention while appealing to consumers.

This article will explore core concepts and technologies, product structure and performance, materials and manufacturing, key quality determinants, supplier selection criteria, industry challenges, practical use cases, and emerging trends in the field of compact thermal food containers.

Core Concepts and Key Technologies

Double-Wall Vacuum Insulation

The central technology behind the 300ml food jar is double-wall vacuum insulation:

Conduction Reduction: Stainless steel layers minimize direct heat flow from inside to outside.

Convection Suppression: The vacuum layer prevents air movement between walls, eliminating convective heat transfer.

Radiation Reflection: Inner reflective surfaces direct heat back to the food, retaining warmth or coolness.

This combination ensures that soups, beverages, or solid foods maintain their intended temperatures for extended periods, providing convenience for on-the-go lifestyles.

Thermal Retention Metrics

Thermal efficiency depends on multiple factors:

Wall Thickness: Sufficient thickness is needed to maintain insulation, balancing durability and weight.

Vacuum Quality: A consistent vacuum layer is critical to prevent thermal bridging.

Lid Performance: Screw lids with silicone gaskets create airtight seals, crucial for both thermal retention and leak prevention.

Portability and Ergonomic Design

A compact diameter and lightweight construction allow the food jar to fit into standard lunch boxes, backpacks, or picnic carriers. An ergonomically designed handle ensures ease of carrying, even for prolonged periods.

Product Structure, Performance, and Materials

Container Body

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

Interior Finish: Polished surfaces ensure hygiene and easy cleaning, preventing bacterial buildup.

Exterior Finish: Powder coating or brushed finishes provide scratch resistance and aesthetic appeal.

Capacity: 300ml optimizes portability while accommodating a full serving for an individual meal.

Lid and Seal

Material: BPA-free, food-grade plastics with integrated silicone gaskets ensure leakproof sealing.

Screw Mechanism: Provides secure closure, essential for travel and preventing heat loss.

Ease of Cleaning: Lid components are easily removable, facilitating hygiene.

Handle and Portability Features

Integrated top handle is ergonomically shaped for secure grip.

Compact form factor allows for easy transportation without sacrificing capacity.

Double-Layer Construction

Inner and Outer Stainless Steel Walls: Maintain structural integrity and thermal efficiency.

Vacuum Layer: Reduces conduction and convection between the walls.

Optional Coatings: Enhance thermal retention and provide aesthetic appeal.

Manufacturing Process

Deep Drawing or Stamping: Produces uniform wall thickness and consistent dimensions.

Surface Treatment: Polishing for interior hygiene; powder-coating or brushing for exterior durability.

Vacuum Sealing: Creates the essential vacuum insulation between walls.

Assembly: Lids, handles, and gaskets are precision-fitted.

Quality Assurance: Thermal retention, leak-proof performance, and drop tests are conducted.

Key Quality and Performance Factors

Material Quality

Use of premium 18/8 stainless steel ensures long-term corrosion resistance.

Smooth interior surfaces allow easy cleaning and hygienic maintenance.

Lid Reliability

Silicone gaskets must maintain elasticity over repeated use.

Screw threads are precision-machined to prevent leaks and ensure secure sealing.

Vacuum Integrity

Consistent vacuum layer is critical for maintaining temperature retention.

Inconsistent vacuum or air gaps reduce efficiency.

Portability

Ergonomic handle design for ease of carrying.

Compact diameter ensures fit in backpacks, cooler bags, or travel carriers.

Supply Chain and Supplier Considerations

Technical Competence

Expertise in stainless steel fabrication and vacuum insulation technology.

Capability to produce BPA-free lid systems and ergonomic handles.

Ability to scale production for bulk orders while maintaining consistent quality.

Regulatory Compliance

FDA and EU-approved food-grade stainless steel.

BPA-free lids and gaskets.

Compliance with heavy metal and phthalate testing standards.

Quality Consistency

Uniform thermal performance across batches.

Leak-proof lids verified with tolerance testing.

Scalable production for B2B and retail channels.

Common Industry Challenges

Durability and Impact Resistance

Stainless steel is impact-resistant but vacuum layers can be compromised if dropped.

External coatings enhance durability without affecting thermal performance.

Leak Prevention

Misaligned silicone gaskets or defective screw threads can lead to spillage.

Comprehensive QA testing is critical.

Thermal Retention Limitations

Performance depends on wall thickness, lid sealing, and vacuum integrity.

Extended hot retention may require additional design optimizations.

Cleaning and Maintenance

Lids and silicone gaskets should be removable for thorough cleaning.

Smooth interior surfaces simplify hygiene without special tools.

Applications and Use Cases

Office Lunches

Maintains soups, rice, pasta, and beverages at optimal temperature.

Compact design fits into office bags and minimizes spillage risks.

Picnics and Travel

Lightweight and portable, suitable for short excursions and outdoor activities.

Secure lids and handles enable safe transport.

Personal Meal Management

Ideal for individuals seeking temperature-stable meals during commuting or study sessions.

Encourages healthier homemade meal options compared to fast food.

B2B and Retail Opportunities

Compact design, vibrant finishes, and functionality make it suitable for corporate gifts, school supplies, and retail sales.

Supports custom branding or color variations for bulk buyers.

Current Trends and Future Development

Safety and Compliance

Rising demand for BPA-free, non-toxic, and food-safe components.

International safety standards compliance is critical.

Design and Ergonomics

Child-friendly handles and aesthetic finishes are increasingly popular.

Modular compartments for snacks and meals are emerging.

Thermal Efficiency Enhancements

Advanced vacuum techniques and possible triple-layer designs.

Lid-integrated thermal retention features.

Sustainability

Stainless steel and reusable plastics reduce environmental impact.

Eco-friendly coatings and recyclable packaging align with sustainability trends.

Frequently Asked Questions (FAQ)

Q1: How long does the 300ml food jar maintain temperature?

Typically 6–8 hours for hot or cold food under normal use conditions.

Q2: Is it leak-proof?

Yes, the screw lid with silicone gasket prevents leaks during transportation.

Q3: Can it fit into backpacks or lunch carriers?

Its compact design allows easy fit in standard backpacks or lunch bags.

Q4: Is it easy to clean?

Yes, removable lid and smooth stainless steel interior facilitate thorough cleaning.

Conclusion

The Stainless Steel Thermal Vacuum Food Container 300ml Food Jar with Lids provides a highly practical, portable, and durable solution for maintaining food and beverage temperatures. Its double-wall vacuum insulation, compact design, leak-proof lid, and ergonomic handle address both convenience and safety. For B2B clients and consumers, this jar represents a reliable, hygienic, and stylish solution for office meals, picnics, or travel.

By emphasizing material quality, lid engineering, vacuum integrity, and ergonomic portability, manufacturers and suppliers can offer a product that meets the demands of modern lifestyles, safety standards, and aesthetic expectations. With evolving trends in thermal efficiency, modular design, and sustainability, these food jars will continue to be a key tool in convenient, on-the-go meal management.