Instruct: Classify a review into positive or negative sentiment.
Query: does not work in our microwave, otherwise ok

I tried putting these bowls in our microwave at 20 percent power for 10 seconds, and they started to spark and food (strawberries and green beans) had burn marks on them. The bowls are a good size, the lids snap on well, and they do fine in our dishwasher, but you may not be able to use them in the microwave - and they are clearly advertised as microwave-safe.