Double Walled Glass Mug - Hummingbird by Francis Dick

12oz high borosilicate glass mug featuring Hummingbird by Francis Dick. Commonly known as ‘laboratory glass’, the borosilicate glass Double Walled Glass Mugs will ensure that you can pour boiling hot water without fearing cracks or shatters. This ultra high-quality glass is often found in high-end restaurants, laboratories, and wineries.