Can You Put Tupperware in the Dishwasher? A Guide to Keeping Plastic Containers Safe

Wondering if you can put Tupperware in the dishwasher? Learn the dos and don’ts of washing plastic containers, how to prevent warping, and the best cleaning methods.

Is Tupperware Dishwasher Safe?

We’ve all been there — stacking dirty Tupperware in the dishwasher only to find it warped, stained, or still greasy after a cycle. While many plastic containers are labelled as dishwasher-safe, they still require proper placement and care to avoid damage. Plus, should we be really using them at all and what are the alternatives?!

How to Safely Wash Tupperware in the Dishwasher

1️⃣ Check the Label – Look for a dishwasher-safe symbol on the bottom of the container. If it’s not marked, it’s best to hand wash.

2️⃣ Place It on the Top Rack – The top rack is further from the heating element, reducing the risk of warping.

3️⃣ Use a Low-Temperature Setting – High heat can cause Tupperware to melt or lose its shape. Opt for an eco-friendly, cooler wash cycle.

4️⃣ Secure Lightweight Containers – Tupperware can flip over and fill with dirty water. To prevent this, wedge it between larger dishes or use a dishwasher-safe rack clip.

5️⃣ Avoid Harsh Detergents – Choose a gentle, plastic-safe detergent like WABLU’s Dishwasher Naked Wonder Tabs® for Dishwash, which are plastic-free and made with 99% natural ingredients.

Why Does Tupperware Warp in the Dishwasher?

Plastic softens at high temperatures. If Tupperware is exposed to direct heat or strong drying cycles, it can become misshapen. Older containers, particularly BPA-free plastics, are even more prone to this.

Can You Put Tupperware Lids in the Dishwasher?

Yes, but they should also be placed on the top rack. If the lids are small, use a dishwasher basket to keep them from falling into the heating element.

The Best Way to Clean Tupperware

🔹 For Greasy Stains: Soak in a mixture of warm water, baking soda, and dish soap before placing in the dishwasher.

🔹 For Bad smells and Odours: A teaspoon of vinegar or lemon juice in the wash cycle helps remove lingering smells.

🔹 For Tough Stains: Sunlight naturally bleaches stains—leave stained Tupperware in direct sunlight for a few hours before washing.

Eco-Friendly Alternatives to Tupperware

While plastic containers are convenient, they come with concerns—especially when heated in the dishwasher or microwave. Heat can cause microplastics to leach into food and water, posing potential health and environmental risks.

🌱 Glass Containers: Durable, reusable, and free from harmful chemicals. Glass is dishwasher-safe and doesn’t absorb odors or stains.

🌿 Stainless Steel Containers: Lightweight, long-lasting, and a great alternative for storing leftovers or taking meals on the go.

🍃 Silicone Food Wraps & Beeswax Wraps: Instead of plastic lids, opt for reusable beeswax wraps to cover bowls and dishes. They’re biodegradable and easy to clean.