Mug - Glass - Hummingbird

12 oz./355ml

High borosilicate glass. Packaged in a keepsake box.

WHAT IS BOROSILICATE GLASS?

Commonly known as ‘laboratory glass’, the borosilicate glass found in these double-walled glass mugs will ensure that you can pour boiling hot water without fearing cracks or shatters. The boron trioxide found in borosilicate glass provides a very low coefficient of thermal expansion, meaning it will not crack under extreme temperatures changes like regular glass. This ultra high-quality glass is often found in high-end restaurants, laboratories, and wineries.

Top-rack dishwasher and microwave safe.

Designed in Canada

Made in China