Black & Blum

Borosilicate Glass Lunch Pot


A lightweight 450ml / 15 fl oz Borosilicate glass bowl with a protective and insulating (keep cool) sustainably sourced wood fibre base and Stainless steel lid.

The silicone lid protects your microwave from food splatter and the clever air release tab ensures no heat vacuum forms whilst heating.

The glass used in the Lunch Pot is Borosilicate, which is lightweight, stain resistant and strong.

The protective and heat resistant base ensures the product can be handled straight from the microwave, with a silicone ring which stops the base from slipping or moving.


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.

Can I put the Glass Lunch Pot Large in the microwave?
The only part of the Glass Lunch Pot Large that is NOT microwave-safe is the stainless steel lid, otherwise, the glass pot, wood fibre base and silicone lid can go in the microwave. The silicone lid makes splatter-proof heating easy, and to ensure it doesn’t get sucked into the pot while it’s being heated, lift the lid and push the tab detail inside the rim to create an air gap. Heat your glass lunch pot inside the wood fibre base, as it does not retain heat and therefore can be handled safely. Food should be heated for a maximum of 2 minutes at a time, stir and repeat if necessary.

Can I use the Glass Lunch Pot Large in the oven?
The only part of the product which is oven safe is the Borosilicate Glass Pot. However, you must ensure that the glass is room temperature before placing it in the oven as glass is susceptible to thermal shock (meaning a sudden change in temperature) - which would cause it to break. When the glass is removed from the oven, AVOID running under cold water or placing on a cold surface. DO NOT allow direct contact with flames or use it under the grill.

Can I put the Glass Lunch Pot Large in the dishwasher?
For optimal product maintenance, place the parts on the top rack of your dishwasher. Try to avoid placing the glass pot under cold water or on a cold surface if it’s hot from the dishwasher, as this may cause it to break.

Can I put the Glass Lunch Pot Large in the freezer?
You can place all parts in the freezer however, as liquids expand when frozen, ensure you leave a space and do not overfill. Ensure food has defrosted completely and has come to room temperature before reheating, DO NOT use the microwave or oven to defrost.

Is this product BPA and BPS free?
Yes, all parts, and all products at Black+Blum are BPS and BPA-free.

The stainless steel lid feels quite stiff sometimes, how can I fix this?
Simply wipe the inside of the lid with vegetable oil and let dry if you’re finding it gets stiff after using a few times. Always make sure the glass pot and silicone lid are INSIDE the wood fibre base before you attempt to shut it, as the stainless steel lid can get stuck when it’s empty.

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


450 ml/15 floz
Weight: 320g/0.70Lbs
Dimensions: 9.5cm x 9.5cm x 11cm /3.74in x 3.74in x 4.33in

Purchase Impact

State: Land and Water

‘When we started this design 3 years ago, we were driven by the aim of developing a lightweight and leak proof product, the opposite of most glass lunch boxes on the market. What we’ve created is exactly this; the Borosilicate glass pot is much lighter than standard glass containers, with a heat-resistant wood fibre base to protect it, and a stainless steel lid to ensure it’s 100% leak proof. Its functional modern design with a retro feel, in a durable and compact product that is perfect for eating on-the-go.’

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