How to Choose the Best Plastic-Free Lunch Box

The best plastic free lunch box is one made from a food-safe material that won't leach chemicals, is easy to clean, and is tough enough to survive a school bag — with ceramic-lined stainless steel leading the pack. As more Aussie families worry about microplastics and everyday waste, going plastic free no longer means sacrificing function or style.

Here's a practical guide to choosing the right plastic free lunch box for your household — by material, features and who it's for.

At a glance: what makes a great plastic free lunch box

• Material first — Stainless steel, glass and silicone each suit different jobs; stainless is the all-rounder.
• Bento compartments — Separate foods without needing extra containers or wrap.
• Leakproof lids — Essential for sauces, dips and wet snacks.
• Spare parts — Replaceable lids and inserts mean one box lasts for years.
• Weight & durability — Light and shatterproof matters most for younger kids.

Which material is best for a plastic free lunch box?

Stainless steel

Stainless steel is lightweight, incredibly durable and — when ceramic-lined like Smash's plastic free range — microwave-safe. It won't stain, hold odours or shatter, which makes it the strongest all-round pick for busy families and lunches on the move.

Glass

Glass is ideal for home use and widely available at supermarkets. It's non-reactive and easy to see into, so it's great for leftovers and fridge storage. The trade-offs are weight and the risk of breakage, which make it less practical for young kids and school bags. See how the two compare in our stainless steel vs. glass guide.

Silicone

Food-grade silicone is flexible, light and dishwasher-safe, which makes it handy for snacks, dips and collapsible bowls. It's best as a partner to a sturdier steel or glass base rather than the main container for a full meal.

Key features to look for

• Compartments: Bento-style designs separate foods without extra containers.
• Ease of cleaning: Smooth interiors or ceramic linings wipe clean fast.
• Leakproof lids: Especially important for liquids and sauces in a lunch bag.
• Spare parts availability: Brands that sell replacement lids and inserts help your box last for years.

What matters most for families

• Durability: School bags take a beating — choose materials that can handle it.
• Weight: Stainless steel is far lighter than glass, so it's more practical for little hands.
• Longevity: Boxes that can be repaired or refitted with spare parts save money and cut waste.

If you're packing for kids specifically, our guide to plastic lunch box safety covers what to check before you buy.

Final tips

When choosing a plastic free lunch box, think about how and where it'll be used. A ceramic-lined stainless steel bento suits work and school runs, while glass is perfect for reheating at home. And going plastic free doesn't mean going it alone — Aussie brands like Smash offer full plastic free lunch and food storage ranges, backed by a spare-parts program so your gear lasts.

Frequently asked questions

What is the best material for a plastic free lunch box?

Ceramic-lined stainless steel is the best all-round material because it's lightweight, shatterproof, easy to clean and, in ranges like Smash, microwave-safe. Glass suits home use but is heavier and breakable, while silicone is best for snacks and inserts rather than a full meal.

Are stainless steel lunch boxes safe for kids?

Yes. Stainless steel is non-toxic, doesn't leach chemicals and won't shatter in a school bag. Smash's Kids Bento uses a ceramic-lined stainless base with BPA-free lids, and a spare-parts program means a single box can last through several school years.

Are plastic free lunch boxes leakproof?

Many are. Look for a box with a well-sealed, leakproof lid if you pack sauces, yoghurt or dips. Smash lunch boxes and bentos use secure lids designed to handle wet foods in a lunch bag without spills.

Can plastic free lunch boxes go in the dishwasher and microwave?

Most components can. Smash's ceramic-lined stainless bases are microwave-safe, and inserts and containers are dishwasher-friendly. The BPA-free lids should be hand-washed and kept out of the microwave. Always check the care guide for your specific product.