These two walls of borosilicate glass create an insulating layer of air. This double-wall feature allows your morning beverage to stay hot and delicious, and the glass always feels cool. These double-walled and insulated borosilicate glass pieces are heat-resistant and microwave-safe. Perfect for all drinks like cappuccino, coffee, tea, latte, and espresso.
This is a supercute mug. I loved it and it was perfect for Valentine’s, even though you can use it all year round. The glass inside is very thin. One of the mugs broke easily a couple of days after getting them but the second one has survived and I use it every day. Love and highly recommend.. Lizney. Miami Lakes, FL. Wed Mar 08 2023