I have purchased 3 packs or 12 containers and have used each at least 3 times. I've used them in both my oven and freezer and haven't had any issues with the jar (I let them cool down a bit beforehand). They clean up well. The lids are made of soft, smooth plastic, which has the slight side effect of feeling greasy when washed. I always thought they would trap the grease from my cooking but after drying I found no grease. I don't usually take my pads out during the wash unless there's a problem. I did this once and they came in easier than I expected. Spacers seem to make a difference, I notice a lot less frosting on my frozen meals compared to those stored in traditional round containers made from "high-impact soda lime glass" from companies unnamed but rhyming T-rex and resentment
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