Since 1938, the Necco Sky Bar has been providing variety-lovers with 4 individually filled chocolate pieces in a single bar. One piece contains a delicious fudge filling, while the next has a creamy white vanilla fondant. Then we have a peanut flavour filling, and finally some delicious caramel.
The bar is 42g in total, so the 4 pieces are each fairly large. The Sky Bar is a fairly rare sight in the US these days, although still remembered and loved by many.