---
title: "Can you microwave a paper coffee cup? No"
description: "No — the plastic lining and the glued seam are not made for reheating. What actually happens, what goes wrong, and what to do instead."
url: https://atoneplace.net/can-you/microwave-paper-coffee-cups/
site: "At One Place"
---

# Can you microwave a paper coffee cup?

**No: No — the plastic lining and the glued seam are not made for reheating.**

A takeaway cup is paperboard with a thin polyethylene lining that keeps the drink in. That lining is rated for a hot drink poured into it once, not for a container being actively heated. Reheating can soften the lining and weaken the glued side seam, so the cup fails at the bottom. Some cups also have a metallic-ink logo or a foil-lined sleeve, which sparks. Pour the coffee into a mug; it takes five seconds and it will heat more evenly anyway.

## What goes wrong

- The glued seam softens and the base drops out
- The polyethylene lining is not tested for active heating
- Metallic printing and foil sleeves arc

## What to do instead

- Pour it into a ceramic mug
- Reheat coffee gently at 50 percent power to avoid boiling it bitter

## Other "can you microwave" questions

- [Can you microwave styrofoam?](https://atoneplace.net/can-you/microwave-styrofoam/) — It depends — Only if the container is labeled microwave-safe, and most takeout foam is not.
- [Can you microwave aluminum foil?](https://atoneplace.net/can-you/microwave-aluminum-foil/) — No — No — foil reflects microwaves and the edges arc, which can start a fire.
- [Can you microwave plastic containers?](https://atoneplace.net/can-you/microwave-plastic-containers/) — It depends — Only ones labeled microwave-safe — cold-storage tubs are not among them.
- [Can you microwave eggs?](https://atoneplace.net/can-you/microwave-eggs/) — It depends — Beaten or pricked eggs, yes. A whole egg in its shell will explode.
- [Can you microwave Tupperware?](https://atoneplace.net/can-you/microwave-tupperware/) — It depends — Yes, if that specific piece carries the microwave-safe symbol on its base.
- [Can you microwave paper plates?](https://atoneplace.net/can-you/microwave-paper-plates/) — It depends — Plain white paper plates are fine; anything with metallic trim or a foam layer is not.
- [Can you microwave metal?](https://atoneplace.net/can-you/microwave-metal/) — No — No — metal reflects microwaves, arcs at edges, and can damage the oven or start a fire.
- [Can you microwave breast milk?](https://atoneplace.net/can-you/microwave-breast-milk/) — No — No — microwaves create hot spots that scald a baby even when the bottle feels cool.
- [Can you microwave takeout containers?](https://atoneplace.net/can-you/microwave-takeout-containers/) — It depends — Only if the container is marked microwave-safe — most are not, and metal-handled ones never are.
- [Can you microwave cardboard?](https://atoneplace.net/can-you/microwave-cardboard/) — It depends — Plain dry cardboard is usually fine briefly; anything with glue, staples, wax or foil is not.
- [Can you microwave glass?](https://atoneplace.net/can-you/microwave-glass/) — It depends — Yes for ordinary heatproof glass; no for leaded crystal, and never straight from the freezer.
- [Can you microwave water?](https://atoneplace.net/can-you/microwave-water/) — It depends — Yes, but very clean water can superheat and erupt when you move the cup.

## Common questions

### Can you microwave a paper coffee cup?

No — the plastic lining and the glued seam are not made for reheating.

### What happens if you microwave paper coffee cups?

The glued seam softens and the base drops out The polyethylene lining is not tested for active heating Metallic printing and foil sleeves arc

## Related pages

- [Can you microwave styrofoam?](https://atoneplace.net/can-you/microwave-styrofoam/)
- [Can you microwave aluminum foil?](https://atoneplace.net/can-you/microwave-aluminum-foil/)
- [Can you microwave plastic containers?](https://atoneplace.net/can-you/microwave-plastic-containers/)
- [Can you microwave eggs?](https://atoneplace.net/can-you/microwave-eggs/)
- [Can you microwave Tupperware?](https://atoneplace.net/can-you/microwave-tupperware/)
- [Can you microwave paper plates?](https://atoneplace.net/can-you/microwave-paper-plates/)
- [Can you wash pillows?](https://atoneplace.net/can-you/wash-pillows/)
- [Can you wash sneakers in the washing machine?](https://atoneplace.net/can-you/wash-sneakers/)
- [Can you recycle pizza boxes?](https://atoneplace.net/can-you/recycle-pizza-boxes/)
- [Can you reheat rice?](https://atoneplace.net/can-you/reheat-rice/)
- [Can you recycle plastic bags?](https://atoneplace.net/can-you/recycle-plastic-bags/)
- [Can you recycle batteries?](https://atoneplace.net/can-you/recycle-batteries/)

## Sources

- US Food and Drug Administration — FDA (https://www.fda.gov/) [Public domain (US Government)]