I have had exactly ONE glass break after pouring in boiling water in these years. (lafujimama.com)
All you need to do is add a cinnamon stick to a cup of boiling water for 10 minutes, and then sweeten the tea with some honey if you want to. (bathnbody.craftgossip.com)
Place into a pot of boiling water for about twenty minutes, until they become really soft. (thehealthymaven.com)