Black+Blum

Steel Lunch Box 950ml Gray/Red Black+Blum

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  • Regular price €19.47
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How does it work in the microwave?
We're excited to introduce this range of microwave-safe steel bowls, but we understand you may be hesitant to use them. After all, we've always been taught never to put metal objects in the microwave. But, this is only partially true. Some metal objects with sharp, pointed edges can cause reflections and sparks from the microwave walls. However, our meal prep sets have been designed in collaboration with our manufacturers to be perfectly smooth and round, so they won't cause sparks. They follow extremely high safety standards and have been rigorously tested.

Is there anything I need to know about microwaving these bowls?
Yes, you should be careful not to dent or deeply scratch the surface of the bowl, as this may mean it is not suitable for microwave use. But rest assured, they need to be major dents and scratches. Only heat one bowl at a time and do not use aluminum foil or cutlery in the microwave (their sharp/pointed edges cause sparks as mentioned above). Heat each bowl for no more than 2 minutes before stirring to repeat if necessary. Note that these bowls take a little longer to heat than glass or plastic containers, but because you can keep the lid closed while microwaving (a unique design feature for us), they are faster than other steel food containers available. Also, the bowls will be hot when you remove them from the microwave, so be careful not to burn yourself.

Can I also put the lid in the microwave?
Absolutely, it can; in fact, this design feature means your food will also heat up faster. Just be sure to open the lid latch, as steam and pressure can build up in the bowl while it's heating.

Are there foods I should avoid when microwaving these bowls?
Yes, fatty and acidic foods can cause eyelid stains. It will still work, but it's worth noting that washing it immediately should eliminate them. Also, definitely avoid foods that cook at high temperatures, like popcorn and sugar, as they can cause burns.

Are these bowls leak proof?

The vacuum-sealed lid lock ensures this line is 100% leak-proof and airtight, which also means your meal prep stays fresher for longer, further reducing food waste. Leak-proof means peace of mind, and there's no point using a reusable lunch box if you have to wrap it in a plastic bag!

Can I put them in the dishwasher, freezer and oven?
Absolutely, these sets are truly multifunctional and are safe in all three. In the dishwasher, be sure to use the top rack for the lid, and the steel bowl is the only oven-safe part (not the lid).

How do I care for my meal prep sets?
We recommend washing all parts with warm, soapy water before using for the first time. All seals and the lid lock valve (ONLY the gray silicone part, do not remove the actual lid button) are fully removable for deep cleaning. Do not use bleach, chlorine-based cleaners, abrasive cleaners, or scouring pads anywhere on the case, as they can damage the finish and cause scratches. Be careful not to use sharp objects like knives directly on the steel, as this can cause scratches.

How do I remove the cover?
To remove the lid, you'll need to open the leak-proof lid latch. This lid latch creates a vacuum seal inside the bowl, so without breaking it, it should be nearly impossible to remove!