Is Stojo Collapsible Cup dishwasher safe?
Sometimes — the Tritan copolyester body is top-rack dishwasher safe, but the silicone lid and gasket should be hand washed to prevent seal degradation and warping.
Quick facts
| Dishwasher safe? | Sometimes — Sometimes — with care |
|---|---|
| Category | Drinkware |
| Source | Manufacturer guidance / material science |
| Last checked | 2026-06-29 |
Why
The Stojo Collapsible Cup is made of Eastman Tritan copolyester for the body and food-grade silicone for the lid and collapsible walls. Tritan is dishwasher safe on the top rack, as it resists heat up to 212°F (100°C) and is chemically stable against alkaline detergents. However, the silicone components can degrade over time when exposed to high heat and harsh detergents: the gasket may lose elasticity, leading to leaks, and the lid can warp or become sticky. The manufacturer explicitly states that the cup is top-rack dishwasher safe, but recommends hand washing the lid and gasket to prolong life. Repeated machine washing of the silicone parts can cause permanent seal failure and cosmetic clouding. The body may also become cloudy if washed on the bottom rack near the heating element.
How do you wash Stojo Collapsible Cup?
- Disassemble the cup by pulling the silicone lid off the Tritan body.
- Remove the silicone gasket from the lid if possible (some models have a fixed gasket).
- Hand wash the lid and gasket in warm, soapy water using a soft sponge; rinse thoroughly.
- Place the Tritan body on the top rack of the dishwasher, away from the heating element.
- Use a gentle, non-citrus detergent to avoid clouding the Tritan.
- Air dry all parts completely before reassembling to prevent mold.
- Reassemble by pressing the lid firmly onto the body.
What happens if you put Stojo Collapsible Cup in the dishwasher?
If you put the entire Stojo cup in the dishwasher, after one wash you may notice the silicone lid feels slightly looser or tacky. After repeated washes (10+ cycles), the gasket can lose its seal, causing leaks when the cup is filled. The silicone may also develop a white, cloudy film from detergent residue. The Tritan body is more resilient but can become etched or cloudy if washed on the bottom rack or with abrasive detergents. The damage is primarily cosmetic for the body but functional for the lid and gasket—leaks will render the cup unusable. The cup is not designed for high heat cycles, so warping of the silicone is possible if the dishwasher has a sanitize or heat-dry setting.
Frequently asked questions
- Can the Stojo cup be used for hot beverages?
- Yes, the Tritan body can handle hot liquids up to 212°F (100°C), but the silicone lid may not seal as well with hot contents due to pressure buildup. Avoid boiling liquids.
- Is the Stojo cup microwave safe?
- No, the Stojo cup is not microwave safe. The silicone and Tritan materials are not designed for microwave use and may warp or degrade.
- Can I put the Stojo cup in the freezer?
- Yes, the cup is freezer safe. The silicone remains flexible at low temperatures, but avoid overfilling as liquids expand when frozen.
- How often should I replace the Stojo cup?
- With proper hand washing, the cup can last several years. Replace if the silicone becomes sticky, cracked, or the seal no longer prevents leaks.
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Last updated 2026-06-29. General guidance — always check your product’s care label. How we verify · Dishwasher care guides.