Just ok. Very flimsy.
When these came, I was really pleased with how heavy they are, and they feel like they will hold up well. My only disappointment was the description says 2 pack, so I ordered 2 to receive 4 cups and only received 2 cups. I did contact customer service via email, because I have laryngitis, and have heard nothing. For these cups, I do give them 5 stars.