Holsters are like cars. Everyone likes something a bit different for a variety of reasons but all of the input here has been pretty good. That being said take a look at Vedder. They are a smaller family run company in FL and make some outstanding products and are very reasonably priced. I have...
If you don't want to mess with all of the various types of diffusers on the market these work incredibly well. You can tie them off and then just toss them when you're done. No mess and no leaves in the tea...
I drink a bunch of tea. Prefer black teas with earl gray the best. Feels like I've ordered every variety on the planet but I have had great luck with the folks at Capital Tea in DC and the Yunnan Gold from Ocean of Tea is amazing