I have a lot of these measuring cups in various sizes. I do use them in my microwave to steam broccoli or warm soup. I have never used them in the freezer but they regularly get washed in my dishwasher. No issues at all until 1:30 in the morning last night when my husband and I heard a crash of some kind. We could not find anything amiss until this morning while retrieving coffee mugs from the same cabinet where these measuring cups are stored. A one cup version had exploded! Ugh. I am tossing the rest of my collection in the recycle bin. I am so sad.