Rectangular Glass Lunch Box

Premium Rectangular Glass Lunch Box - High-Borosilicate Food Storage Solution for Commercial & Household Meal Management

Xuzhou Muzhishi Crafts Co., Ltd. has been cranking out these rectangular glass lunch box since 2005, all in high-borosilicate glass. Professional grade, hands down. They can take thermal shock up to 120°C–150°C, and the coefficient of thermal expansion is 3.3 x 10^-6 K^-1. So yes, freezer to microwave in one go is totally fine. Sizes? 900ml, 1100ml, or 1800ml. Every box has a medical-grade silicone gasket plus a BPA-free PP locking lid that seals tight. The factory runs ten lines and can push a million units per day per furnace, so quality stays consistent. CE, FDA, SGS, LFGB backed. Samples land in 3–5 days; mass production wraps up within 30 days of your approval.

What Makes Our Glass Food Containers Stand Out

Plastic lets things like BPA and chemicals get into your food. What is this borosilicate glass? Inert chemically, there's no argument there. Bacteria can't stick to the surface because it doesn't have pores. You know how plastic gets smelly no matter how many times you wash it with soap? Not going to happen here.

Rectangular is useful, not just for looks. This item stacks well in fridges and freezers and makes good use of the available room. And when you heat something up, the form makes sure that there are no cold spots like you would get in a strange container.

The rim doesn't chip easily, even if you're picking it up with one hand, putting it in the sink or just shoving it in a closet. And from the freezer to the oven to the table all at once? Not a problem. It's simple: busy kitchens need that flow from cooking to serving.

Rectangular Glass Lunch Box Specifications

Versatile Applications Across Industries

Professional Meal Prep and Batch Cooking: These containers are great for home chefs because they keep weekly meal plans organised. The rectangle shape makes the most of the freezer space and keeps the food fresh. You don't have to give up valuable storage space to make Sunday meals and store them neatly.

Corporate Catering & Food Service: High-end meal delivery services choose our containers because they look good and keep heat in. Your brand looks more professional when it's made of glass, which makes every served meal seem more valuable.

Health-Conscious Families: Moving away from plastic items and toward non-plastic ones makes families feel better because they know their food only comes into contact with safe materials. Our products keep tastes the same and don't let chemicals or flavours that you don't want get into other foods.

Laboratory and Industrial Storage: These containers are used for more than just storing food. They are also used in specialised environments that need chemical-resistant storage with the ability to be inspected visually. The way the glass is made makes sure that it won't clash with sensitive materials.

Superior Material Engineering

Standard glass cracks under sudden temperature swings. High-borosilicate? It shrugs them off. We're talking -20°C freezer to 100°C microwave no stress damage. Handles it like it's nothing. That's the mechanical integrity you're paying for.

The hermetic seal keeps internal pressure stable. That might sound technical, but it just means oxidative degradation happens way slower  salads keep their crunch, proteins don't come out freezer-burned. The medical-grade silicone gaskets lock everything airtight. No leaks, even when you're slinging it around in a bag.

Acidic tomato sauce, alkaline stir-fry  nothing reacts with the glass. It stays completely inert, so your food ends up tasting the way it's supposed to. No metallic tang, no plastic aftertaste, just whatever you cooked.

Quality Assurance Process

Every Rectangular Glass Lunch Box gets put through the wringer before it's shipped. Thermal shock tests run the glass across huge temperature swings to prove it won't crack. Leakage pressure tests check that the seal holds its integrity even under vacuum conditions.

We check the glass using polarized light to spot internal tension  that's how we know the annealing went right. Chemical migration tests also get run, to make sure everything lines up with FDA 21 CFR 177.1210 and EU 1935/2004. So there's zero heavy metal leaching.

We've got a quality-control system that catches defects before anything goes out. So when you receive containers, they meet international safety standardsevery batch, no exceptions.

Manufacturing Excellence & Customization

We run 10 glass furnaces, each with 6 automated lines, pumping out up to a million units a day per furnace. That kind of capacity means we can handle a small boutique order or a huge commercial contract without messing up delivery schedules.

Plenty of customization optionshot stamping, inside engraving, screen printing, even custom colors. Corporate gifts with your logo? Private-label retail? Our design team handles that. Need something more complex like a custom lid or an odd shape? We'll 3D print a prototype fast.

Sticking with the same suppliers over the long haul brings our raw material costs down by 10%–15%. We pass that along to you. It's an integrated setup that keeps quality on point and prices honest.

Frequently Asked Questions

Q: Can these containers go from freezer to oven directly?

A: Yeah, the high-borosilicate glass can handle thermal shocks up to 150°C. Just remember to take the PP lid off before putting it in the oven  it's only rated for 120°C.

Q: So, about the lidsare they actually leakproof when you put liquids in?

A: We use medical-grade silicone gaskets and a four-point locking mechanismthat creates a hermetic seal. That works for soups and sauces, as long as the container stays upright.

Q: What customization minimums do you require?

A: Minimum order quantities vary depending on how complex the customization is. Contact our team for specifics. We can also send free samplesso you can judge the quality before you commit to a production run.

Q: So, how am I supposed to clean and care for these containers?

A: Throw them in the dishwasherthey handle it just fine. For stubborn stains, a soak in warm water with a little baking soda will bring back the clear finish. Don't use abrasive scrubbers though; those will scratch the surface.

Q: What certifications guarantee food safety?

A: All our products come with CE, FDA, SGS, and LFGB certifications. And we test every batch for chemical migration to make sure it meets international food-contact standards.

Partner With a Trusted Manufacturer

Xuzhou Muzhishi Crafts Co., Ltd. covers the full export processcustoms clearance, inspections, and multimodal transport. After-sales? They reply within 24 hours, so you're never stuck wondering about a concern. If shipping damages something, they compensate. And for repeat orders, that support doesn't fadeit keeps going.

Ready to elevate your Rectangular Glass Lunch Box solutions? Contact our dedicated account managers at long@muzhishi.com for free samples and customized quotations. Experience the difference that 20 years of glass manufacturing expertise delivers.