Hot drink lovers will know the gamble of taking a sip from your favorite beverage. Go in too quickly, and you risk burning your tongue on its hot contents; wait too long, and it goes into the lukewarm (or worse, stone-cold) territory. Ideally, you'd know how warm your drink is without doing any sheepish touches around the outside of your mug.
This DIY coaster ensures you’ll never swig a cold coffee again
