I pack my own tea for work using the filter bags sold by Adagio. They are $3 for 100 ($0.03 each!). I pack them up at home. At work I heat some water, pop in a filter bag already filled with tea, let it steep, toss the bag...done! No cleanup and at such a small price, I don't have any intention of trying something new. The bags are fairly large and have a lot of room for the leaves to unfurl and do their magic.