A gram of water is “a drop”?

Grrrr…journalists.  In a segment on NPR today talking about how many calories are in your average Thanksgiving meal, the reporter defined a calorie as “the amount of energy required to heat one gram of water (about a droplet) one degree Celsius.”  Huh?  A droplet?  That’s some heavy water.  A gram of water is more like a thimble full.  You don’t see thimbles very often these days.  What is the modern equivalent of yesteryear’s “a thimble full”?