...not dishwasher safe! What a huge disappointment. I wish they were a heavier plastic that could withstand the dishwasher. After a guest helped me clean up after a get-together, I realized too late that she'd put them in the dishwasher. I was left with a squished, melted, waste of money after only one use. I have since replaced them with a glass set, and I really do miss the thumb notch, but I'd rather worry about a broken glass than have to hand-wash my wine glasses.