These are pretty nifty for us tea drinkers out there: Teastick Gems. Made of Eastman Tritan™ (if I remember right that is a form of copolyester, the newest substitute for Lexan™). Hence it is heat and dishwasher safe.
Pretty little tea holders indeed! More information on use and care is here. They hold enough tea (be it real tea or herbal) for a 10-14 ounce mug, making it nearly perfect for camp use. They retail for $12 and the company does sell online as well as in tea oriented stores.
They also make a old school version in stainless steel as well – which is simple and elegant. It retails for $18.