I was first introduced to Britannic Afternoon Tea by my ex-pat British friend Christine who insists on stopping at 4 pm on backpacking trips to make a pot of tea and munch on Pepperidge Farm chessman. I don't mind doing this in her company because she's such a delightful companion, but I'd have never considered doing it on my own until last year, when I hiked across Scotland.
While the Brits have some funny ideas about a lot of things, they do know their tea, and once introduced to the practice, I became a willing instigator. I'm not particularly choosy about the tea I brew and find regular Lipton tea bags to be just fine, especially since I drink from the same pot as I boil things in. There is the added baggage of carrying out wet tea bags though which can be a pain, even though I seal all of my dry and damp trash in used ziploc baggies and rarely have leaks.
In addition to the shot of caffeine, which helps invigorate me during the final hours of daylight, it's nice to kick back for about 45 minutes and admire one's surroundings during a tea interlude, sit on a sun baked rock, air your toes, jot a journal entry or dry out damp gear from the prior night.
After rushing around at home all week, it doesn't make much sense to rush a hike too. Have a brew and a cookie, chat about nothing important with your hiking partner, and make some time to watch the ants. It changes the whole pace of your day.