If you need a new coat, pick up a Descente Passport Jacket. There's a voucher to not only Copper, but Winter Park and A-Basin.
Descente Passport JacketThe Copper/Vitamin Water deal ended ($10 weekday vouchers), but it's worth a shot to look on Craigslist for people selling them.
Vitamin Water/Copper Deal If you're flying in on Frontier into Denver, there's a 2 for 1 voucher for Copper
2 for 1 Frontier Voucher