Product Specs:ø4.3" x 3.5" / 13oz Recycled Glass HMM, a Taiwanese design studio that specializes in coffee and office accessories. The brand name, HMM, stands for Human - Mechanic - Method. Specializing in high quality and finely crafted coffee ware and office accessories, HMM breathes life into the design and interprets these artifacts in a heartfelt way. W Glass by HMM. The glasses are made by local craftsmen of Spring Pool Glass in Taiwan using recycled glass. The integrated glass handle is practical and heat-proof, the tapered bottom allows easy stacking, and the angled exterior and circular inner surface enable easy cleaning. Realize unlimited prospects of circular economy and environmental friendliness. Made in Taiwan Avoid sharp temperature changes Hand wash recommended Microwave is not suggested due to various temperature changes Read the brand story of HMM here.