Review on 🍵 Insulated Stackable Tea and Cappuccino Glasses by Leslie Matlak

There is a small mark on the bottom of the cups that looks like air was blown in during manufacture. I left my mugs in a pot of soapy water in the sink overnight. The two cups on the bottom now contain soapy water in the cavity between the inner and outer glass walls. I tried standing the cups on paper towels overnight and tilting them at the right angle so the water was above the mark, but the water was still trapped. Looks terrible so I don't use those two.