If you don't have an infuser handy, you can filter your loose leaf tea with tea filter bags. We use natural, non-bleached chlorine-free tea bags to ensure you get the best flavor and no harmful chemicals leeching into your tea. T-Sac has the best quality and excellent design (the flap is long enough to be versatile, and the bottom of the bag is gusseted to allow the tea lots of room to expand); we source direct from the company in Germany.You can also iron or staple these shut to make your tea more transit-friendly.