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How to Choose the Best Plastic-Free Lunch Box

Written by: Smash Products | Date: 7/30/25

As families become more conscious of microplastics and environmental impact, plastic-free lunch boxes are gaining popularity in homes and schools across Australia. But with so many materials, sizes, and features to choose from, finding the right one can feel overwhelming.

Here’s a practical guide to help you make the best choice for your household—without sacrificing function, safety, or budget.

Start with the Right Material

Smash ceramic bento box on the table

1. Stainless Steel
Stainless steel is lightweight, incredibly durable, and increasingly microwave-safe when lined with ceramic. It's a great option for everyday use, especially for school lunches. It won’t absorb smells or stain, and its long life makes it a sustainable investment. Brands like Smash offer ceramic-lined options with spare parts available—so a lost lid doesn’t mean replacing the whole thing.

Glass bento boxes on a table with fresh fruits around

2. Glass
Glass is ideal for home use (and brands like Décor are readily available at supermarkets). It’s non-reactive, easy to clean, and perfect for batch cooking or leftovers. The main downside? It’s heavier and more fragile, so it might not be the best fit for kids or commutes.

Silicone bento bowls on the table

3. Silicone
Silicone lunch boxes are flexible, lightweight, and dishwasher-safe. They're useful for snacks or soft foods, but may not offer the same structural strength as steel or glass.

Key Features to Look For

  • Compartments: Bento-style designs make it easy to separate foods without needing extra containers.
  • Ease of cleaning: Look for smooth interiors or ceramic linings that wipe clean quickly.
  • Leakproof lids: Especially important for liquids and sauces in lunch bags.
  • Spare parts availability: Brands that offer replacement lids or inserts help extend the life of your product.
Family preparing meal in the kitchen

What Matters Most for Families

  • Durability: School bags take a beating—opt for materials that can handle it.
  • Weight: Stainless steel is much lighter than glass, making it more practical for younger kids.
  • Longevity: Products that can be repaired or refitted with spare parts are not only budget-friendly but also better for the planet.

Final Tips

When choosing a plastic-free lunch box, consider how and where it’ll be used. A stainless steel bento box might be perfect for the classroom, while a glass container may suit your home lunch routine. Starting with one or two containers and building from there makes the shift feel manageable.

And remember—going plastic-free doesn’t have to mean going it alone. With more Aussie brands like Smash offering smart, family-friendly alternatives (and spare parts!), it’s easier than ever to make a switch that lasts.