Tea drinkers have a hobby that’s easy to take on the go…just grab your favorite tea bag from the pantry and brew anywhere you can find hot water. Did you know that coffee drinkers can do the same thing? You can buy empty paper tea bags on Amazon (among other places), and fill them up with your favorite ground coffee, to enjoy delicious fresh brewed coffee at work or anywhere. There’s a great writeup on this over at Instructables. It’s easy to do, but do keep in mind that for best results, ground coffee should be used soon for maximum flavor (I personally don’t grind more than I’ll be using in that same day).