Tall Tea Mug, 16 oz, is designed for easy steeping of a mug of tea. The mug is handcrafted from heat resistant, lead-free Borosillicate glass. Borosillicate glass is very lightweight, thin and durable. It is the glass most often used in testing laboratories. The mug comes with a removable food grade stainless steel infuser. The infuser lid, made of food grade stainless steel and PBA-free silicone, functions as a drip dish for the infuser.