They are! Reusables are both microwave and dishwasher safe, though we do recommend placing them on the top rack away from the heating filament. Because all Reusables are made from sugar beets, they’re still completely safe and non-toxic even when heated.
I bought both the wine glasses and larger 16 oz drink glasses. They both were great. The bases are such that they don't tip over. They have a little bit of give for smaller hands. Not flimsy. We were very happy with this purchase for our wedding reception.
