As a tea novice, I needed tips! NO written description of the glass, on paper or online, except for the word "borsillicate", which is fine, but this single wall glass is really THIN! Microwave? Stovetop? I am not a tea brewing person; as this was an impulse buy from Massdrop, I have NO IDEA what the recommended and safe way is to use this particulat pot in this "two story" configuration. :(