Small tea mug for one person. Extremely functional, you can make your tea directly in the glass in the removable filter. Easy to use and clean. With an optional glass filter or stainless steel strainer. Naturally heat resistant, microwaveable (without stainless steel strainer), dishwasher safe. It is made of pure borosilicate glass, does not emit any substances, is odor, and taste-neutral. The filter/strainer and lid can be ordered as parts too.