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Black + Blum square stainless steel leakproof microwave safe lunchbox available at Babipur.
A close up of a adult standing over a kitchen worktop and pressing down on the lid lock on the Black + Blum square stainless steel leakproof microwave safe lunchbox
A close up of a adult standing over a kitchen worktop and pouring food into the Black + Blum square stainless steel leakproof microwave safe lunchbox
A close up of a Black + Blum square stainless steel leakproof microwave safe lunchbox showing different fruit inside the lunchbox
A close up of a Black + Blum square stainless steel leakproof microwave safe lunchbox showing a pasta dish inside the lunchbox
A close up of a Black + Blum square stainless steel leakproof microwave safe lunchbox showing a salad dish inside the lunchbox
A close up of a Black + Blum square stainless steel leakproof microwave safe lunchbox showing the lid detail
A stack of the Black + Blum square stainless steel leakproof microwave safe lunchboxes

Black+Blum Large Stainless Steel Square Lunchbox

₩35,000

Black+Blum Large Stainless Steel, Leakproof, Microwave-Safe Square Lunchbox | 1.4 L

The Black+Blum Large Stainless Steel Square Lunchbox is built for big appetites and batch-prepped meals. With a generous 1.4-litre capacity, it’s ideal for main meals, large portions or storing leftovers. Made from high-quality stainless steel with a leak proof, vacuum-sealed lid, this lunchbox is designed to go from fridge to microwave to table with ease.

This is an all-in-one solution for food storage, meal prep and packed lunches. The semi-transparent lid lets you check contents at a glance, while the vented lock system allows you to microwave your food without removing the lid. Lightweight yet tough, the box is oven-safe (without the lid), freezer-safe and top-rack dishwasher safe.

The container is made from premium 304 stainless steel with a BPA-free polypropylene lid and a silicone vacuum seal. The lid includes a built-in vent lock to reduce splatter when microwaving. The seal is fully removable for easy cleaning, and the container’s square design makes it easy to stack with other boxes in your fridge, freezer or cupboard.

Babipur has been a trusted eco retailer since 2007, helping families along their sustainable living journeys. An official UK stockist of Black+Blum reusable food containers, shop the range at Babipur.

FAQs

How is the Stainless Steel Square Lunchbox microwave safe?
This lunchbox is made from high-quality stainless steel with rounded edges that prevent sparking and make it safe to microwave. It meets strict safety standards and has been rigorously tested. Always open the lid vent before heating to release steam.

Can I microwave the lid too?
Yes. The lid is microwave-safe. Just pop the vent open to prevent pressure build-up and avoid splattering. No need for cling film.

Is the Black+Blum Square Lunchbox dishwasher, freezer and oven safe?
Yes. The stainless steel container is safe for the freezer and oven (lid not oven-safe). The lid is top-rack dishwasher safe. For best results, do not overfill when freezing liquids as they may expand.

Is it leak proof?
Yes. The vacuum-sealed lid lock creates a completely airtight and leak proof seal. Perfect for carrying saucy meals without worrying about spills.

How do I open the lid?
Press the button on the lid to release the vacuum seal. Then lift the lid slowly and evenly. It opens more easily when pulled gently.

  • 1.4-litre capacity, ideal for main meals and large portions
  • Microwave-safe stainless steel container (see FAQs)
  • Vacuum-sealed lid with vent for safe reheating
  • Leak proof and airtight
  • Stackable square design for tidy storage
  • Semi-transparent lid to check contents easily
  • Dishwasher-safe (lid top rack only)
  • Freezer-safe and oven-safe (container only)
  • Made from 304 stainless steel, BPA-free polypropylene and silicone
  • Dimensions: 19.5cm x 19.5cm x 7.7cm
  • Weight: 320g
  • Made from high-quality 304 (18/8) stainless steel: durable, rust-resistant and fully recyclable
  • Designed for long-term use to reduce food waste and reliance on disposables
  • Encourages meal prep and leftover storage to cut waste at home
  • Minimal plastic use, always BPA, BPS and phthalate free, and selected only when necessary
  • Every purchase supports 1% for the Planet
  • Donations help City Harvest rescue surplus food and reduce landfill emissions while feeding those in need
  • 1% for the planet member
    1% for the planet member
  • plastic free
    plastic free

Fast shipping worldwide shipping

No quibble 60 day returns

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Black+Blum Large Stainless Steel Square Lunchbox

₩35,000

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Black+Blum - Meal Prep Made Easy

Black+Blum creates durable, design-led lunchware and hydration products made to last a lifetime. Using high-quality materials like 304 stainless steel and natural bamboo, their range supports low-waste living through practical, reusable design. From leakproof food containers to charcoal-filtered water bottles, every product is BPA-free and thoughtfully engineered for performance and longevity. Black+Blum also donates 1% of all sales to food waste charities such as City Harvest, helping to rescue surplus food, reduce emissions and support communities in need.
Black+Blum - Meal Prep Made Easy
Behind the Brand

Behind the Brand

Founded in 1998 and relaunched in 2014 by designer Dan Black, Black+Blum has grown into a leading name in sustainable food and drink containers. Every product is designed in-house at their London studio with care, creativity and purpose. With a commitment to reducing single-use plastic and food waste, Black+Blum’s mission is to make everyday routines more considered, enjoyable and eco-conscious. Through their support of 1% for the Planet and focus on responsible material choices, the brand continues to innovate both in the quality of their products as well as sustainability.
About us

Equality Through Fairtrade

Together, we can make trading fairly with farmers and labourers the norm- because it should be! At Babipur we want to tackle unequally divided supply chains, and ensure that the workers making our products are paid fairly and treated with respect. 

Ethical Focus

At Babipur, we thoroughly look into each and every brand stocked in our store so that you don’t have to! Bringing together a range of sustainably sourced and exploitation-free products for all the family, we aim to make our customers feel confident that they are consuming ethically at Babipur.

An Indie Business with Great Service

Hey there! We’re Babipur, a small but mighty indie family business nestled at the foothills of Eryri. Since 2007, our awesome team has been here for you, working passionately from our Porthmadog warehouse and offices. Don’t forget to join our buzzing Facebook group and be part of our amazing community. We love helping you with your questions and orders, no matter how big or small.

Shipping & Service

Fast Worldwide Shipping

Here at Babipur we aim to despatch your orders quickly using Royal Mail, Parcelforce, GLS and other couriers. We pack orders Monday to Saturday, if you need an express delivery option we recommend ordering before 1pm for next working day delivery. Tracking details will be sent to you by email or text.

Returns

If something isn't as expected, doesn't fit, or it's simply not right for you, just return it to us within 60 days of delivery for a no quibble refund. We do ask that items are returned in unused condition if you've simply changed your mind. If you have a faulty or damaged item please get in touch, return it to us for a refund or replacement and we'll cover the return costs.

Customer Service

We are here for you! We believe in offering you the very best customer service possible. You can email, direct message us on socials or even pick up the phone Monday to Friday 9-5. We are a small independent business and we'll do whatever we can to help, always. Any questions, queries, issues or suggestions, just get in touch and we'll be happy to hear from you.