Yes they will... but dont freeze or refridgerate them.

Hersheys uses a filler in their chocolate. its like a wax. When it gets cold, the wax comes to the surface and does whats called "blooming". You know how old chocolate gets that "ashy" look to it?? Thats blooming. Keep them in a cool (not cold) dark place. Pantry, not too high (heat rises).

A chocolatey alternative: www.lindtusa.com They have milk chocolates in red wrappers available year round. White chocolates have the gold wrapper. They are a lil more expensive but TOTALLY worth it quality wise. If you live in the midwest or on the east coast, there might be a retail store near you... you can go get a free sample. Otherwise they are at the grocery store or target, smaller more expensive bags though.