Are Stainless Steel Lunch Boxes with Silicone Seals Safe for Kids in Canada?

As parents, we spend a lot of time thinking about what goes into our children's lunches.

Fresh fruit. Homemade sandwiches. Healthy snacks they'll actually eat.

But there's another question more families are starting to ask:

What is their food sitting in for hours every day?

If you're considering a stainless steel lunch box with silicone seals, you may be wondering whether it's truly safe for everyday use.

The short answer is yes.

When made with high-quality food-grade materials, stainless steel lunch boxes with silicone seals are widely considered one of the safest, most durable, and most practical options for school lunches in Canada.

Let's take a closer look at why.

Why Parents Are Choosing Stainless Steel Lunch Boxes

Traditional plastic lunch containers have been a staple for decades, but many parents are looking for alternatives that are built to last and made with fewer synthetic materials.

Food-grade stainless steel offers several advantages:

• Durable and resistant to dents, stains, and cracks

• Easy to clean

• Does not absorb food odours

• Suitable for everyday school use

• Long-lasting compared to many plastic containers

High-quality lunch boxes are typically made from 304 food-grade stainless steel, sometimes referred to as 18/8 stainless steel. This grade is commonly used in food preparation equipment, water bottles, and kitchenware around the world.

Learn more about our Nom Stainless Steel Lunch Box Collection

What About Silicone Seals?

Many leak-resistant lunch boxes use silicone gaskets or seals around the lid.

These seals help prevent foods such as yogurt, fruit, dips, and pasta from leaking into backpacks and lunch bags.

Food-grade silicone is widely used in products such as:

• Baby bottle nipples

• Pacifiers

• Baking mats

• Kitchen utensils

• Food storage containers

When manufactured for food-contact use, silicone is designed to remain flexible across a wide range of temperatures and helps create a secure seal without the use of hard plastics.

The combination of a stainless steel container and a food-grade silicone seal allows families to enjoy the durability of steel while reducing spills during daily use.

Do Stainless Steel Lunch Boxes Contain BPA?

Stainless steel itself does not contain BPA.

Many parents specifically choose stainless steel because it eliminates concerns associated with certain plastics that may contain BPA or other additives.

When evaluating any lunch box, it's still important to review the materials used in:

• Lid components

• Seals and gaskets

• Dividers

• Accessories

Reputable brands should clearly identify the materials used in their products and provide information about food safety testing where applicable.

Are They Safe for School Lunches?

For most families, stainless steel lunch boxes with food-grade silicone seals are an excellent choice for everyday school lunches.

They are commonly used for:

• Sandwiches

• Fruits and vegetables

• Crackers and snacks

• Pasta dishes

• Rice meals

• Dips and sauces

Because stainless steel does not absorb flavours and odours easily, many parents find it easier to keep lunch containers fresh even after years of use.

What to Look for When Buying a Stainless Steel Lunch Box

Not all lunch boxes are created equal.

When shopping for one, consider the following:

1. Food-Grade Stainless Steel

Look for 304 (18/8) food-grade stainless steel.

2. Food-Grade Silicone Seals

The seal should be removable for cleaning and made from food-contact-safe silicone.

3. Independent Product Testing

Look for brands that perform third-party testing or provide information about compliance with applicable safety requirements.

4. Easy-to-Clean Design

Removable seals and smooth interior surfaces can make regular cleaning much easier.

5. Durable Construction

Children's lunch gear experiences daily drops, bumps, and backpack adventures. Choose products built for real family life.

Frequently Asked Questions

Is stainless steel safer than plastic for lunch boxes?

Many parents prefer stainless steel because it is durable, long-lasting, and does not contain BPA. The best choice depends on your family's needs and the quality of the materials used.

Are silicone seals safe for food?

Food-grade silicone is commonly used in food-contact products and is widely considered safe for everyday food storage applications.

Can stainless steel lunch boxes be used every day?

Yes. One of the biggest advantages of stainless steel is its durability. A quality lunch box can often last for years of daily school use.

How do I clean a silicone seal?

Many lunch boxes feature removable silicone seals. Removing the seal periodically and washing both the seal and the lid helps maintain cleanliness and performance.

More information about our products here 

The Bottom Line

A well-made stainless steel lunch box with a food-grade silicone seal offers a practical combination of durability, cleanliness, and everyday convenience.

For Canadian families looking to reduce plastic use while investing in lunch gear built to last, stainless steel remains one of the most trusted choices available.

At nom°, we designed our lunch boxes around the realities of family life; durable stainless steel interiors, removable silicone seals for easier cleaning, and thoughtful designs made to support years of school lunches, adventures, and everyday memories.