Top 10 Borosilicate Glass Lunch Box Manufacturers in the World[2025 Updated]

Unlike ordinary glass, borosilicate glass can withstand extreme temperature changes, making it perfect for microwave, oven, and freezer use. In this article, we've carefully selected the Top 10 Borosilicate Glass Lunch Box Manufacturers in the World, read along to know more!

Company Name	Establishment Date	Location
Pyrex	1915	United States
Feemio	1988	China
Borosil	1962	India
LocknLock	1978	South Korea
Glasslock	1967	South Korea
Luminarc	1948	France
Bormioli Rocco	1825	Italy
OXO	1990	USA
Libbey	1818	USA
Tupperware	1946	USA

1.Pyrex

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2.Feemio

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3.Borosil

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4.LocknLock

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5.Glasslock

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6.Luminarc

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7.Bormioli Rocco

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8.OXO

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9.Libbey

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10.Tupperware

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Why Do Glass Lunch Box Crack Easily?

1. Unsuitable Material

If your glass lunch box cracks easily, the first reason might be the wrong material choice. Common types of glass products on the market include: soda-lime glass, tempered glass, borosilicate glass, and crystal glass. While their main component is silicon dioxide (SiO₂), different oxides are added during production to alter their properties.

Based on material properties and manufacturing processes, their thermal shock resistance rankings are:

Tempered glass > Borosilicate glass > Crystal glass > Soda-lime glass.

• Soda-lime glass: Cheap but fragile. It can only handle 50°C temperature differences.

• Crystal glass: Slightly better (up to 60°C temperature change), but still risky for sudden temperature changes.

• Borosilicate glass: Borosilicate glass can withstand instantaneous temperature differences up to 150 °C, ideal for microwave use.

• Tempered glass: The toughest, withstanding 200 °C temperature difference. It's heat-treated for strength and shatters into safer, blunt pieces if broken.

2. Improper Usage

• The ingredients themselves cannot be used for microwave heating, including eggs, whole tomatoes.

• If the ingredients are too dry, the food at the bottom may be very hot during the heating process, but the upper glass has not yet been heated, and the temperature difference between the upper and lower parts causes the glass to burst. If it is served with soup, the steam from the soup will reduce the overall temperature difference and heat more evenly.

• If the lid is not opened before heating or proper ventilation is left, internal pressure will accumulate, leading to explosion.

• If metal cutlery (such as a rice spoon) is placed together in a glass container and heated, it will also cause explosion.

Safe Buying and Usage Guide for Glass Lunch Box

1. Choose the Right Material & Certifications

Best options: Whether it is for storing hot drinks, heating in the microwave, or cold storage, we recommend borosilicate glass and tempered glass.

Avoid: Soda-lime and crystal glass for hot liquids/microwaves.

Quality matter: Cheap glass may contain impurities, heavy metals, or plasticizers. If the glass lunch box has quality certifications such as ISO9001, CE, FDA, its quality will be more guaranteed.

2. Use Correctly in Different Scenarios

Microwave Heating:

Microwaves have a particularly strong penetrating power, which requires the container to have high thermal conductivity to transfer heat to the food more quickly rather than accumulating heat on the glass surface.

Borosilicate glass has better thermal conductivity, but in general, both borosilicate glass and tempered glass are good in this regard.

Four rules for microwave heating:

1. Avoid food that is easy to explode, like food with shells, eggs, whole tomatoes.

2. Avoid dry foods. You can add some water to the food.

3. Remove metal utensils, such as metal rice spoons.

4. Open the lid of the glass lunch box, or leave appropriate ventilation holes.

Fridge/Freezer Storage:

Don't overfill—leave space for food expansion to avoid cracks.

Quick Reference Guide:

Glass Material	Temperature Endurance Range (°C)	Applicable Scenarios
Soda-lime glass	50	Dishwasher, freezer (refrigerated only)
Crystal glass	60	Dishwasher, freezer (refrigerated only)
Borosilicate glass	150	Microwave, dishwasher, freezer
Tempered glass	200	Microwave, dishwasher, freezer

If your glassware has no material labels, treat it as soda-lime glass to avoid sudden temperature changes. Stay safe!

Conclusion

In today's market, borosilicate glass lunch boxes have become the ideal choice for consumers who value safety, durability, and eco-friendliness. From well-established international brands to competitive Chinese manufacturers, the Top 10 Borosilicate Glass Lunch Box Manufacturers in the World we've listed here wil meet your purchasing needs, which are known for their high-quality products, innovative designs, and global presence.