Quick answer: Stainless steel is the best material for a school lunchbox. It survives drops in a school bag, contains no BPA or phthalates, resists smells and stains, and is infinitely recyclable. Plastic costs less but wears out faster, and glass is too fragile for young children.
When it comes to choosing the right lunchbox for your child, there’s more to think about than just the colour or pattern. What it's made from can make a big difference to your child’s health, your environmental impact, and how long the lunchbox lasts.
In this article, we break down the most common lunchbox materials—plastic, stainless steel, bamboo, glass, and silicone—and explore which one really is the best for school kids.
Plastic is everywhere—it’s cheap, light and colourful. But it’s also the least eco-friendly option and, depending on the quality, can contain harmful chemicals like BPA or phthalates. It also sheds microplastics over time and can warp or crack with rough use or repeated washing.
Best for: Budget-conscious families
Drawbacks: Not durable, not eco-friendly, and not the safest choice for food storage
Often marketed as natural and sustainable, most bamboo lunchboxes are actually made from bamboo fibre mixed with resin (usually melamine). That resin can contain formaldehyde, which isn’t great for health or the planet. While lightweight and stylish, bamboo isn’t the hardwearing option many assume.
Best for: Occasional use at home
Drawbacks: Questionable safety, can degrade quickly, not oven or dishwasher safe
Glass is clean, non-toxic and doesn’t absorb flavours or stains. It’s great for adult lunches or storing leftovers. But for kids? It’s the most fragile of materials —not ideal for being tossed around in a school backpack!
Best for: Older teens or adults
Drawbacks: Fragile, heavy, not great for younger kids
This is where stainless steel really shines—especially for school lunches. It's durable, totally non-toxic, easy to clean, and doesn’t absorb food smells or flavours. It’s also the most eco-friendly option, being infinitely recyclable and built to last for years (or even decades!).
Yes, it can be a little heavier than plastic, but the difference is usually minimal—and well worth the trade for peace of mind.
Best for: Everyday school use
Drawbacks: Slightly heavier than plastic (but way more durable)
If you're packing a school lunch every day, you want a lunchbox that’s safe, easy to clean, and tough enough to handle the daily chaos of the playground. On every major point—health, durability, sustainability and ease of use—stainless steel comes out on top.
Plastic may be the cheapest option, but it’s not the safest or longest-lasting. Glass is lovely, but not practical for kids. Bamboo and silicone have their uses, but both fall short in terms of durability or eco-friendliness.
Our pick? Stainless steel. It’s the best all-rounder for your child’s lunchbox—and the planet.
→ Check out our range of stainless steel lunchboxes for kids
✔︎ All our lunchboxes are made from food-grade stainless steel, independently tested in certified labs
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✔︎ Backed by a 15-year warranty
✔︎ We stock spare parts—so you can repair, not replace
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Whatever you do… buy well, buy once.
Find the best stainless steel lunchbox for every age—durable, non-toxic, and perfect for school lunches, snacks, and everything in between.
Choosing a lunchbox that will work for you is very important but not necessarily easy!
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