Straight to the Point Our favorite travel coffee mug is from  Zojirushi . It keeps coffee hot for a remarkably long time and has a lid that locks. After working at a café out of college, I stopped drinking caffeine. It was the result of having way too much coffee—post-college, I did not understand moderation—and constantly coming home with my hair, skin, and clothes smelling of it. But after getting married to a coffee enthusiast years later, I came back to my love of coffee. Though I work from home and can savor my coffee slowly out of a mug, my husband often brings his second cup on the go. To find the best travel mugs (for him and everyone else), I tested 23 of them to see which ones kept coffee and tea the hottest the longest, didn’t leak, and offered the best drinking experience.  The Tests Our favorite travel mugs didn't leak and had excellent heat retention.…