Consider keeping a separate teapot for your green tea. While this isn't necessary, it's a common practice for tea drinkers who regularly enjoy green tea because it prevents cross flavoring from black or herbal teas. If this doesn't bother you (indeed, you might not even notice the difference), just be sure to wash your regular teapot well green tea should only be brewed in ceramic, clay, china, glass, or stainless steel teapots. Do not use plastic or aluminum teapots.