Is it safe to use reusable silicone food storage bags in the freezer?
Based on 1 peer-reviewed studykitchen
Verdict: Safer
Yes for freezer and fridge. Platinum-grade silicone stays stable at cold temperatures.
What's actually in it
Stasher and similar silicone food bags are platinum-grade silicone, durable from freezer to boiling. At freezer temperatures, siloxane release is very low. Main limits are the silicone valve or seal area, where cheap silicone can leach more.
What the research says
A 2025 study in J Hazard Mater quantified siloxane release from silicone at oven temperatures (highest release) and documented much smaller release at room temperature. Cold is easier still.
For freezer storage, silicone bags are a clean upgrade over plastic. Look for "platinum-grade" or "medical-grade" labels.
The research at a glance
| Study | Journal | Year |
|---|---|---|
| Silicone bakeware as a source of human exposure to cyclic siloxanes. | J Hazard Mater | 2025 |
What to use instead
Browse our vetted, non-toxic alternatives. Every product is third-party certified.
Shop Non-Toxic Kitchen