Is Plastic cup dishwasher safe?
Sometimes — with care
Plastic cups are conditionally dishwasher safe depending on the type of plastic.
Quick facts
| Dishwasher safe? | Sometimes — Sometimes — with care |
|---|---|
| Category | Drinkware |
| Source | Researched — confirmation in progress |
| Last checked | 2026-06-17 |
Why
Many plastic cups are made from polypropylene (PP, #5) or Tritan, which are generally dishwasher safe on the top rack. However, thin or single-use plastics (like polystyrene) can warp or melt in high heat. Always check the bottom of the cup for a dishwasher-safe symbol.
How do you wash Plastic cup?
Place on the top rack away from the heating element. Use a low-heat or no-heat drying cycle to prevent warping.
More drinkware
Last updated 2026-06-17. General guidance — always check your product’s care label. How we verify.