Tested: The Best UK Lunch Boxes for Leaks and Kids

A Guardian product tester has identified the best lunch boxes in the UK after subjecting 40 models to rigorous real-world trials. The search focused on containers that are durable, practical, and, crucially, capable of preventing leaks from yoghurt to salad dressing.

Packed lunches are a high-stakes daily task for many families, and the right container is essential to avoid soggy sandwiches and dried-out snacks. The tester, a parent of three primary-school-age children, evaluated the boxes based on leakproof performance, ease of cleaning, weight, compartment practicality, and sustainability.

How the Lunch Boxes Were Tested

The testing process was comprehensive and chaotic, designed to replicate real-life use. The tester's children were enlisted as unwitting participants, cramming the boxes into school bags and throwing them across playgrounds. Boxes were also left on school fields over weekends to simulate neglect.

At home, a more scientific approach was taken. Boxes were filled with water, shaken vigorously, and left on their sides for 30 minutes to check for leaks. The tester also packed a variety of actual lunches, including yoghurt, hummus, and salad with dressing, to see how the containers performed with different food types.

Other factors assessed included the empty weight of each box, the usefulness of compartment sizes, and how easy they were to clean at the kitchen sink. Sustainability was a key criterion, with the tester examining materials, durability, availability of replacement parts, and end-of-life recyclability.

The Best Overall Lunch Box for Kids

The Munchkin Kids' bento lunch box, priced at £22.99, was named the best overall option for children. This colourful, seemingly indestructible box features a moulded plastic inner tray with five compartments and includes a stainless steel fork and spoon.

A removable silicone inner lid creates separate seals for each compartment, preventing foods like pasta salad from mixing with neighbouring yoghurt. The tester reported that the bento format excited her children and resulted in them coming home with empty boxes. However, the box is made from a lot of plastic, spare parts are not available, and it can be awkward to wash.

The Best Budget Lunch Box

For those seeking value, the Brabantia Make & Take lunch box bento, costing £15.95, was the top budget pick. This large, practical box has a main compartment containing two smaller boxes, one with a lid, and a lift-out divider.

It impressed the tester with its genuinely useful, large compartments capable of holding a side salad or a decent portion of fruit, with room left for a sandwich. It is easy to clean, dishwasher safe, and feels robust. Brabantia offers a five-year guarantee and sells spare parts like seals and containers separately. The main drawback is its size, which requires significant bag space.

The Best Lunch Box for Sandwich Lovers

The Stanley Legendary Classic Useful box, retailing at £40, was selected as the best option for sandwich enthusiasts. This simple, functional stainless-steel design features two flip latches and a capacious interior with no frills.

The tester praised it for fitting a sandwich properly without any squashing, a surprisingly rare feat among the containers tested. It is also easy to clean. The high price and the fact it is not watertight were noted as downsides.

After completing the tests, all 40 lunch boxes were donated to the Salvation Army for resale to raise funds.