I'm glad I kept mine. I had a funny feeling they were worth holding on to. I posted my theory on the box of raisins a week or two ago. See below... You start by returning to Eris during the Festival of the Lost. As a reward for keeping your box of raisins, she offers you a common mouldy grape helmet and a questline, 'King of the Raisin.' As you progress through the questline, the helmet increases in light (cannot be infused at this point). Upon completion of the quest, you'll be rewarded with an exotic raisin helmet - a wrinkly raisin with glorious horns, like The Ram, but wrinkly and shriveled. The perks of this fantastic helmet include a perk whereby upon taking melee damage, your guardian unleashes a vicious burst of toxic raisins which do damage over time. You're also immune to damage from poision (wizards, Thorn etc). But that's not all, you also get a raisin grenade with an additional charge. [b][u]ALL HAIL THE RAISIN![/u][/b]