Re-uasable Muslin Tea Bags are a great alternative to a tea infuser. They are also suitable for cooking.
Directions:
Place 1 tea spoon of your desired tea blend into the muslin tea bag and place tea bag in boiling water for 2-3 minutes (depending on the preferred strength). Muslin tea bag can be steeped 3 times in a single seatings, and an be re-used 3-4 times* recommended (However, this is based off how well the tea bag is cleaned between use).