Black+Blum Square Microwaveable Multifunction Food Box Stainless Steel

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Large

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Low stock - 7 items left
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Free Mainland UK delivery over £49 - No Quibble Returns

Quick Overview: The Black+Blum Square Microwaveable Multifunction Food Box is genuinely microwave safe stainless steel, in two sizes.

Q&A Specs Care&Use Guarantees FAQ Brand Info

The Black+Blum Square Microwaveable Multifunction Food Box is stainless steel that's genuinely safe to put in the microwave, tested and approved by the Good Housekeeping Institute. A vacuum-sealed lid lock keeps it 100% leak proof and airtight, and the lid can stay on while microwaving, which speeds up heating and prevents splatter. It comes in two sizes for meal prep, food storage, or a daily lunch box, and is dishwasher, oven and freezer safe throughout.

Genuinely microwave safe steel: Tested and approved to go in the microwave, not something most stainless steel containers can claim.
Leak proof, airtight lid lock: Keeps food fresher for longer and prevents spills.
Lid can stay on while microwaving: The lid lock vent lets steam release, so it heats faster than other steel boxes and won't splatter.
Stackable for easy storage: Boxes and lids stack neatly together.
Dishwasher, oven and freezer safe: Just not the lid in the oven.

What Customers Ask About This Product

Can I really put this in the microwave?

Yes, it's genuinely microwave safe steel, tested to extremely high standards and won't cause sparking.

Are there foods I should avoid microwaving in it?

Avoid foods that heat to extreme temperatures, like popcorn or sugar, as these can cause burn marks, and take care with oily or acidic foods like tomato soup.

How do I open it?

Push the button to release the lid lock, then pull the lid upward slowly rather than quickly.

Can I put it in the dishwasher, freezer and oven?

Yes to all three. The lid is top rack dishwasher only and isn't oven safe.

In our experience...

Stainless steel in a microwave isn't actually a universal no. It's specific metals and sharp edges that cause sparking, and this steel and shape are designed to avoid that entirely.

The lid lock vent is doing more than one job. It lets the lid stay on while microwaving, which both speeds up heating and stops splatters.

Burn marks aren't a safety issue. Oily or acidic food like tomato soup can mark the lid, but it won't affect how safely the box performs.

Certain foods genuinely aren't suited to it. Things like popcorn or sugar heat to extremes that can damage the box, so they're worth avoiding.

It's been independently tested, not just self-certified. It's been tested and approved by the Good Housekeeping Institute.

Specifications

Small: 1.1L, 19.5cm x 19.5cm x 5.8cm, 310g

Large: 1.4L, 19.5cm x 19.5cm x 7.7cm, 320g

Material: Stainless steel (304/18-8), BPA-free polypropylene, silicone

Care & Use Instructions

Microwave: Genuinely microwave safe. Heat one box at a time, maximum 2 minutes before stirring and repeating. Keep away from metal surfaces, cutlery or foil while microwaving, and don't use empty.

Dishwasher: Dishwasher safe, lid on the top rack only.

Oven: Box is oven safe, the lid is not.

Freezer: Freezer safe, leave room for liquids to expand.

Cleaning: Wash all parts with warm soapy water before first use. Avoid bleach, chlorine-based or abrasive cleaners, which can dull the finish.

Why Buy From Art of Living?

Founded in Reigate in 1972, we've spent over five decades helping customers select quality tableware and cookware. We've been twice nominated for the Excellence in Housewares award for customer care.

No-quibble returns, even used items
Half-price accidental damage replacement for two years
Price match guarantee

Read our unique guarantees Contact us

Frequently Asked Questions

What if I've used it and don't like it?

Return it anyway. Our no-quibble guarantee covers used items. If it's not right for you, get in touch and we'll sort out a refund.

How does the Half-Price Replacement guarantee work?

If you accidentally break this item within two years of buying it, we'll replace it at half price. Just get in touch with proof of purchase and a photo of the damage.

How long does delivery take?

Standard delivery to mainland UK addresses can take 5-7 working days (but is usually much quicker than that), and it's free on orders over £49. Next day delivery is available for £9.95 on orders placed before 1pm Monday to Thursday, depending on your location and our stock levels. You can also collect from our shops in Cobham or Reigate, or our warehouse in Redhill.

Can I collect this item instead of having it delivered?

Yes. You can collect from our Reigate shop (72 High Street, RH2 9AP), our Cobham shop (16 Anyards Road, KT11 2JZ), or our warehouse in Redhill (40 Ormside Way, RH1 2LW). Just select click and collect at checkout. If the option isn't available, this is because there isn't enough stock in your selected collection location. Please get in touch and we can organise stock to be transferred to the right place.

Delivery Information

Everything you need to know about getting your order to you — including delivery times, regional charges, knife deliveries, and how to collect in store.

Mainland UK

Service	Cost
Standard Free Standard Delivery — orders over £49 - Up to 7 working days	Free
Standard Standard Delivery — orders under £49 - Up to 7 working days	£4.95
Age Verified Knife Delivery — age-verified service - Up to 7 working days	£6.95
Express Next Day Delivery - Order before 1pm Mon–Thu, where available	£9.95
Saturday Saturday Delivery - Order before 1pm Friday	£12.95

Knife deliveries: All knives and bladed products require an age-verified delivery service. A signature from someone aged 18 or over will be required on receipt. This service cannot be combined with Next Day or Saturday delivery options.

Regional & Island Deliveries — Standard Service

Isle of Man £12.95

Isles of Scilly £12.95

Northern Ireland £12.95

Channel Islands £14.95

Click & Collect

Free collection from our stores and warehouse

You can collect your order from our shops in Cobham or Reigate, or from our warehouse in Redhill.

If your closest shop does not appear at checkout but others do, it simply means that location is currently out of stock for your chosen items. Give us a call on 01737 222996 and we can arrange a transfer from another location.

International Delivery

Republic of Ireland & Europe

Currently suspended:

It is not currently possible to deliver to the Republic of Ireland or mainland Europe. We hope to reinstate this service as soon as possible and apologise for any inconvenience caused.

Rest of the World

If your country is not listed — including the USA, Australia, and other destinations — this is most likely because couriers charge by volumetric weight: a combination of package size and weight that makes standard online rates impractical to calculate automatically.

Please call us on 01737 222996 with the details of your order. We will advise on shipping costs within 24 hours and ask whether you would like to proceed.

Before you order internationally, please note:

All overseas shipments are at your own risk. We recommend taking out appropriate transit insurance to cover any damage in transit.

Customs forms for all international packages declare the full value and a description of the contents. Any customs or import duties levied on arrival in your country are your responsibility. Your local customs office can provide further information.

Other Destinations

If your desired country or region is not listed, please contact us and we will do our best to help.