A fresh box of chocolates.
Each manufacturer usually has its own “code.” If you find a manufacturer whose chocolates you enjoy, get to know their codes. A swirl with two loops on it may mean caramel for one company and butter cream for another, but it will generally always mean the same thing within a brand.
Beyond codes look for signs of nuts (large bumpy surfaces) or coconut (small bumpy surfaces). Hard caramels are typically square or rectangular and soft caramels are typically flat and round (like a silver dollar). Chocolates that are wrapped often have liquid or softer centers (cherry cordials for example).
Of course, some manufacturers provide maps to their goodies on the inside lid of the box or color pictures to help you identify what you’re selecting.
But, the best way to find out what’s in the inside of your chocolate is to taste it.