Is Tupperware Containers dishwasher safe?
Sometimes — the container body (Tritan or polypropylene) is top-rack safe, but the lid and silicone gasket should be hand washed.
Quick facts
| Dishwasher safe? | Sometimes — Sometimes — with care |
|---|---|
| Category | Containers |
| Source | AI-reviewed · manufacturer guidance & material science |
| Last checked | 2026-07-28 |
Why
Tupperware containers are typically made from Tritan (a copolyester) or polypropylene (PP). Tritan can withstand dishwasher heat up to about 85°C (185°F) without warping, but the high heat and alkaline detergent can cause clouding (etching) over time, especially on clear bodies. Polypropylene is more heat-resistant but can still warp on the bottom rack if placed too close to the heating element. The lids often contain a silicone gasket that degrades under repeated dishwasher cycles, losing its seal and causing leaks. The manufacturer recommends top-rack washing for bodies only, and hand washing for lids and gaskets to preserve the airtight seal. Decals or printed logos may peel off after repeated washes. The specific failure modes are: clouding/etching on clear Tritan, warping on thin PP parts, seal degradation on silicone gaskets, and decal peeling on printed items.
How do you wash Tupperware Containers?
- Disassemble the lid by removing the silicone gasket from its groove.
- Hand wash the lid and gasket in warm soapy water using a soft sponge; rinse thoroughly.
- Place the container body on the top rack of the dishwasher, away from the heating element.
- Use a gentle cycle with low heat and avoid the 'heated dry' setting.
- After washing, air dry all parts completely before reassembling.
- Reinsert the gasket into the lid only when both are fully dry to prevent mold.
What happens if you put Tupperware Containers in the dishwasher?
If you put a Tupperware container in the dishwasher, especially on the bottom rack or with high heat, you may notice after one wash that the clear body becomes slightly hazy (clouding). After repeated washes, the clouding becomes more pronounced, and the silicone gasket may lose its flexibility, leading to a poor seal and leaks. The lid may warp if exposed to high heat, causing it to not snap on properly. Printed logos or measurement marks can peel off after several cycles. The damage is primarily cosmetic for the body (clouding) but functional for the lid and gasket (loss of seal). Over time, the container may no longer be airtight, reducing its effectiveness for food storage.
Frequently asked questions
- Can Tupperware containers go in the microwave?
- Yes, most Tupperware containers are microwave-safe, but remove the lid to allow steam to escape. Avoid microwaving empty containers or those with high-fat foods that can reach high temperatures.
- What is the maximum temperature Tupperware can withstand?
- Tupperware containers made of Tritan or polypropylene can typically withstand temperatures up to 100°C (212°F) for short periods, but prolonged exposure above 85°C may cause warping or clouding.
- How often should I replace the silicone gasket?
- Replace the silicone gasket every 6-12 months, or sooner if it becomes loose, cracked, or no longer seals tightly. Hand washing extends its life.
- Can I freeze food in Tupperware containers?
- Yes, Tupperware containers are freezer-safe. Leave some headspace for expansion, and avoid overfilling. Thaw in the refrigerator before microwaving.
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Last updated 2026-07-28. General guidance — always check your product’s care label. How we verify · Dishwasher care guides.