Lunch box purchase skills

1. Lunch box material selection

Priority should be given to PP, PE or biodegradable materials (e.g. PLA/bamboo fiber) that meet the GB 4806 food-grade standard to avoid the precipitation of harmful substances.

2. Sealing of lunch box

Multi-layer buckle or silicone sealing strip design is required to ensure that the soup does not seep out, and the sealing can be verified by inverting the test with water.

3. Container capacity

According to the type of food, choose the layered structure (e.g. 3-5 compartments) and load-bearing strength (recommended ≥2kg) to avoid stacking and deformation leading to flavor cascading.

4.Temperature resistance

According to the use of scenarios to choose the temperature range:

• ①Microwave heating should choose high temperature resistant material (PP material can withstand 120 ℃)
• ②Refrigeration should choose low-temperature resistant material (PE material can withstand a minimum of -20 ℃)
• ③Pay attention to the applicable temperature range of the product labeling
• ④Avoid condensation when packing cold food in high temperature materials.

5.Environmental attributes

• ①Give priority to biodegradable materials:
• PLA polylactic acid (corn starch-based)
• Bamboo fiber/straw fiber
• Sugarcane pulp molded products
• ②Check for environmental certification labels:
• BPI Compostable
• FSC Forest Certification
• China Environmental Labeling (Ten Ring Certification)
• ③It is recommended to choose recyclable lunch boxes.

6.Volume design

• ①Layered and compartmentalized design:
• Individual sauce compartment (50ml capacity recommended)
• Staple food/dishes partition (recommended 3-5 compartments)
• Taste-proof partition (height ≥3cm)
• ②Adaptable capacity:
• 500-800ml for single person
• Recommended 1000-1200ml for business set meal
• Layered combinations are available for special needs

7.Brand and certification

• ①Recognize the regular brand:
• Check the qualifications of the manufacturer
• Check QS/SC production license number
• Confirm GB 4806 food contact material standard
• ②International certification reference:
• FDA food grade certification
• LFGB German Standard
• Japan JHOSPA certification

8.Convenience of use

• ①Humanized design:
• Anti-scalded hand structure (double-wall/heat-insulating groove)
• Easy-tear sealing design
• Anti-spill buckle (recommended ≥ 3-point buckle)
• ②Portability considerations:
• Weight control in 100-300g
• Rounded edges
• Stacking storage design

9.Price and cost-effective

• ①Reasonable budget allocation:
• Daily use recommended 1-3 yuan / a
• Business scenes can choose 5-8 dollars high-end models
• Eco-friendly material premium of about 30-50
• ②Bulk purchasing skills:
• Starting from 100 pieces can reduce the unit price by 20%.
• Mix and match specifications more economical
• Pay attention to the e-commerce platform full-reduced activities

10.Special Functional Requirements

• ①Specific scene adaptation:
• Soup special (sealing degree ≥ IP67)
• Salad box with draining layer
• Thermal insulation type (aluminum foil layer + PE cotton)
• ②Innovative design:
• Self-heating lunch box
• Foldable and portable
• Intelligent temperature display

When choosing a lunch box, it should be considered in the context of the actual use of the scene, and it is recommended to keep the product test report. Note for daily use: PP material should not exceed 3 heating cycles, paper lunch box should avoid long time soaking, and the aluminum foil box should not hold acidic food.