Black & Blum

Borosilicate Glass Lunch Bowl


A lightweight 750ml / 25 fl oz Borosilicate glass bowl with a protective and insulating (keep cool) sustainably sourced wood fibre base and Stainless steel lid.

The silicone lid has a clever air release flap so it can be kept on the glass during microwaving/oven heating and avoid food splattering.

The inner container is made from hand blown high-quality Borosilicate glass that is lightweight, strong, recyclable and stain resistant.

The base is made from polypropylene and 30% sustainably sourced wood fibre (PEFC). It includes a silicone ring to help further protect the glass if dropped and stops the base from slipping/moving if on a vibrating surface like a train or aeroplane table.


100% leakproof
Microwave safe, including wood fibre base for easy handling when hot (*not Stainless steel lid)
Oven safe glass and silicone lid (*not wood fibre base)
Dishwasher safe
Freezer safe
BPA free

Glass, stainless steel, polypropylene with wood fibre and silicone.

Is the Glass Lunch Bowl microwave safe?
Yes, the Borosilicate glass bowl, wood fibre base and silicone lid are all microwave safe. However, the steel lid is not microwave-safe. Lift the silicone lid slightly and push the tab detail inside the glass bowl rim to create a gap. This ensures that the lid does not get sucked into the bowl during microwaving. Keeping the silicone lid on during microwaving ensures that the heated food does not splatter the inside of your microwave. The wood fibre base does not hold heat and makes it easy to remove the bowl from of the microwave without burning your hands. Two minutes maximum in one go. Stir and repeat if further heating is required.

Is the Glass Lunch Bowl oven safe?
Yes, the Borosilicate Glass Bowl (on its own) is oven safe. WARNING: Glass is susceptible to thermal shock. AVOID SUDDEN CHANGE IN TEMPERATURE – it will cause the bowl to break. When heating food make sure you Preheat the oven first. DO NOT use the grill or allow direct contact with gas flames. Do not place glass in preheated oven directly from the fridge or freezer (allow it to adjust to room temperature before placing in an oven). When you remove the glass from the oven DO NOT place on a cold surface or run under a cold tap.

Is the Glass Lunch Bowl dishwasher safe?
Yes, all parts are dishwasher safe, but we recommend top rack. To avoid thermal shock (sudden temperature change which will cause the glass to break), be careful to allow glass to cool after the cycle, before exposing it to cold elements such as food or placing it in a fridge/freezer.

Is the Glass Lunch Bowl freezer safe?
Yes, all parts are freezer safe. Be careful to avoid overfilling the bowl with liquid based foods as these will expand when frozen (by approximately 9%). Please allow it to defrost fully before microwaving/reheating (do not defrost in the microwave).

Is the Glass Lunch Bowl BPA and BPS free?
Yes, all parts are BPA and BPS free.

How do I make the stainless steel lid easier to turn open?
If your lid is stiff to turn and difficult to open, wipe the inside thread surface with vegetable oil and then wipe dry. This will make it easier to open. Do not attempt to close the steel lid onto the wood fibre base, without both the glass and silicone lid being applied.

What is the wood fibre bowl made from?
The base bowl is made from a mixture of polypropylene and 30% sustainably sourced PEFC wood fibre.

Can I get replacement glass bowls if mine breaks?
Yes, we stock replacement glass inner parts. Please go to our REPLACEMENT PARTS area in the SHOP menu dropdown.


750 ml/25 floz
Weight: 440g/0.97Lbs
Dimensions: 14cm x 14cm x 8cm / 5.51in x 5.51in x 3.15in

Purchase Impact

State: Land and Water

‘We wanted to create a glass lunch box that was better than others on the market. Previous to our design, other glass lunch boxes were not fully leak proof and too heavy to be used on-the-go. It took us nearly three years to develop this design and there were many different iterations along the way. Taking advantage of the lightweight and strength of Borosilicate glass, we were able to create a better solution. The design is modern but has an almost utilitarian retro appeal. Using Stainless Steel and the wood-fibre polymer base to protect the glass is a lovely combination of materials. The end design is innovative and unique to the market. It offers a durable, functional solution that will age well and is perfect for carrying your food with you and for eating from.’

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