The Blue Gift is a gift with a golden loop and a blue texture. This grants the Christmas Vest when opened, which is probably more useless than the permanent Halloween Vest, if you have it. Useful against Ice Elementals, though.
The Blue Gift is the most common gift in the game, with a 50% chance of spawning.
It contains the Christmas Vest; a permanent armor that grants iceproof ability and +25 HP.
Once you open it, you lose it.
If you already have it opened, you can earn it again, but you can't open it.