The Slate Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacks
The Slate Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacksThe Slate Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacks
The Slate Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacks
The Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacks
The Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacks
The Moss Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacks
The Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacks
The Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacks
The Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacks
The Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacks

Lunch Bag | Large | Slate

Regular price£32.00
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Tax included. Shipping calculated at checkout.

  • Free UK shipping on orders over £85
  • Low stock - 1 item left
  • Inventory on the way

10L Insulated Lunch Bag with Leak-Proof Seal and Adjustable Strap

The Slate Black+Blum Large Insulated Lunch Bag is designed for people who bring proper food with them, not just snacks. With a generous 10-litre capacity, it comfortably carries a full day’s meals, drinks and containers, making it well suited to workdays, studios, campus or longer journeys. 

Dry Bag Inspired, the roll-top opening and welded seams create a dependable, leak-resistant seal when kept upright, while the insulated lining helps maintain temperature until it’s time to eat. Made from recycled PET with a structured yet flexible form, it’s robust enough for daily use but easy to pack away when empty. A removable, adjustable shoulder strap allows it to be worn cross-body or carried by hand, keeping the look clean and practical without unnecessary detail.

  • Adjustable Shoulder Strap
  • Insulated three-layer construction
  • Food Safe / Wipe Clean
  • 10L Capacity
  • Weight: 300g
  • Dimensions: 31.5cm x 17cm x 34cm
  • Materials: Recycled PET, PEVA, Zinc Alloy, Polypropylene, Poly-cotton
  • Hand wash only

Born in London in 1998, Black+Blum was founded by design graduates Dan Black and Martin Blum. Now led by Dan, this award-winning studio specializes in high-quality, eco-friendly lunch boxes and water bottles. Their "buy once, buy well" ethos focuses on functional, leak-proof designs and sustainable materials like stainless steel and glass to help you reduce single-use plastic.

We ship to all UK Mainland addresses.

Shipping choices and charges are calculated by weight and size and we offer the following shipping options:
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Small items + large letter size (parcels up to 250g) :

Royal Mail 24: (delivery aim next working day but not guaranteed; fully tracked): £6.00

Royal Mail 48: (delivery aim 2/3 working days but not guaranteed; fully tracked): £4.50
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Standard Parcels (up to 3kg) :

Royal Mail 24: (delivery aim next working day but not guaranteed; fully tracked): £8.00

Royal Mail 48: (delivery aim 2/3 working days but not guaranteed; fully tracked): £6.50

Royal Mail Special Delivery: (next day guaranteed service; fully tracked): £10.00
Note. this service has a 2kg limit (rather than 3kg)
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Large Parcels (3kg +) :

Royal Mail 24: (delivery aim next working day but not guaranteed; fully tracked): £12.00

Royal Mail 48: (delivery aim 2/3 working days but not guaranteed; fully tracked): £10.00

Royal Mail Special Delivery: (next day guaranteed service; fully tracked): £15.00
Note. this service is for 2kg+ (rather than 3kg+)
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General

Any order over £85 is free delivery and will be shipped using a Tracked 48 service unless another service is specified.

Delivery methods are auto-calculated at checkout and are dependent on size and weight.

Orders received by 1 pm will usually be dispatched same day. Orders received after 1pm will ship on the next available working day (Mon-Fri).

Note: We do not usually dispatch orders on Saturdays or Sundays.

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Thoughtful design that lasts

Founded in London in 1998 by industrial designers Dan Black and Martin Blum, Black+Blum creates reusable food and drinkware built around one principle: buy once, buy well. Every product is developed in-house, balancing clean industrial design with practical innovation. From leakproof lunch boxes and insulated flasks to reusable water bottles and food storage, each detail is engineered for everyday reliability, long service life and reduced environmental impact. Today, Black+Blum products are sold in more than 60 countries and have received over 25 international design awards.

Designed to solve everyday problems

Black+Blum's products are shaped by genuine user needs rather than seasonal trends. The brand pioneered products including an adult bento-style lunch box for Western meals, charcoal-filter water bottles, stainless steel leakproof lunch boxes and innovative food flasks. Premium materials, repairable components where possible and rigorous product testing ensure every item is built for years of daily use. Sustainability comes through durability, thoughtful engineering and reducing dependence on disposable packaging.

Built around daily routines

Good product design should disappear into everyday life. Black+Blum approaches each collection by refining how people carry, prepare and enjoy food on the move, removing unnecessary complexity while improving performance. Leakproof seals, durable materials, wide openings for easy cleaning and modular accessories are all considered from the outset rather than added later. The result is a collection that works just as well at the office, on a commute or outdoors, with products that remain practical long after passing trends have faded.

FAQs

Black+Blum is a London-based design brand founded in 1998. All products are designed in-house, with a focus on functional design, durability and reducing reliance on single-use plastics.

Black+Blum specialises in premium reusable food and drinkware, including insulated food flasks, water bottles, lunch boxes, travel cups and food storage designed for everyday use.

Yes. Black+Blum insulated food flasks use double-wall vacuum insulation to help keep food hot for several hours or cold for even longer, depending on the contents and conditions.

Yes. Black+Blum has received more than 25 international design awards for its innovative approach to reusable food and drinkware.

Words from our happy customers

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Excellent service. When it seemed the universe had decided I was not to receive my package, Sammy defied nature itself to ensure it arrived and I even got a badge. Couldn’t be happier. The artwork arrived well packaged and is beautiful; exactly as described.

Simon Ackred

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Online order just received. Carefully packaged in double tissue paper and arrived quickly. Cute gift tags in box too. 😊

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I've just received an online order from Ustudio, so happy with the process and the attentive packaging! Great selection of art/home/stationery items too, would definitely recommend!

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This shop is fantastic - not just for the quirky and unique items that won't be found elsewhere but the service too (really friendly and attentive). I was looking for a special present but left with several, which were all massively appreciated.

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Absolutely beautiful stationery and homeware shop. The cards are hilarious. Staff are warm, welcoming, helpful and friendly.

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