Unique designs, quality build and a company that gives back. The GROSCHE glass teapots are quality infuser teapots made from heatproof borosilicate glass. Choose from a variety of sizes and teapot designs with glass infusers or stainless steel infusers. Prepare your loose-leaf teas such as green teas and herbal teas in the infuser teapot and take the infuser out when your tea is at the desired strength. Most of our teapots can be used with teapot warmers.