Maybe you only need one travel mug. Maybe you’ve never left a travel mug in the cup holder of your car until a new life form began to grow on the bottom of the cup, amidst your tea dregs. Maybe you’ve never brought your mug back inside and had one of your children helpfully put it “somewhere” for you, never to be found again.
Or maybe you like to have a spare or two around… you know, just in case. If that sounds like a good idea, you might want to go sign up for a free mug.