Warning: Thanksgiving Feast Event quest

Another warning: The buff coupons that you may receive from either one of the event NPCs, have a time-limited availability of 10 minutes. Meaning, you're required to activate the coupon within 10 minutes. At least, this was the case with the coupons I got: 'Burning Aroma' and 'Sudden Stomachache'.

Update from a fellow Maplestory official forum user:

I can confirm this is also the case with So Greasy (forgot the original name but it had Greasy in it) and Journey to Cooking.