Is it safe to put plastic sippy cups in the dishwasher daily?
Based on 2 peer-reviewed studiesbaby
Verdict: Avoid
No. Daily dishwasher cycles degrade plastic and increase BPA and microplastic release.
What's actually in it
Sippy cups, valves, and silicone spouts take daily abuse. Dishwasher cycles combine heat, strong detergent, and water jets, which etch the surface and push microplastic release higher over time.
Cloudy, scratched, or warped sippy cups leach more.
What the research says
A 2025 study in Chemosphere showed kids' plastic products release more bisphenols after repeated heat and wear. A 2025 study found BPA in most tested baby bottles.
Hand wash plastic sippy parts with warm (not hot) water. Or switch to stainless steel sippy cups, which are dishwasher safe and don't degrade.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Assessing bisphenols migration from children's products. | Chemosphere | 2025 |
| Extraction of BPA from packaged milk and baby bottles. | Food Chem X | 2025 |
What to use instead
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