Monday through Friday I have to drive my daughter to school, so morning is a rush. I seldom like leaving without a travel mug full of fresh brewed tea in hand though. The mornings are pretty cold right now and it is nice to have something warm to drink for the drive. I typically brew my tea inside of a teapot, but in the morning I am in a hurry and don't want lots to clean later.
My solution for brewing loose tea to go is an infuser basket and a stainless steel travel mug. Why stainless steel? We tend to avoid plastic in our house for a variety of reasons. They do make some lovely glass travel tea mugs, but I'm a huge klutz so I'm guessing it wouldn't travel for long (for me anyway). Stainless steel is a great choice because it is resilent (within reason of course), cleans up easily and retains heat for a long time.
I use this one and really like it. It has a 20 oz capacity so I can make a really big cup of tea to get me through the morning. Plus it can also be used at my local coffee shop for their venti size drinks. I like to go green whenever I can. I then start my kettle, set the infuser basket to rests on the rim, fill with some loose tea, and steep for a few minutes. When it is done I just remove the infuser basket, put the lid on and go. Very easy and minimal cleanup.
That is how I enjoy a nice cup of loose tea to go. You can save even more time by setting up everything the night before, including putting the tea in the infuser basket.