Given that this is the time of harvest and the wine should pour, this little fey would be fun for my first October Monday Monster.
Armor Class: 9 
Hit Dice: 1d8+1* (5 hp)
No. of Attacks: Special
Special: intoxication, charm
No. Appearing: 2-4
Saves As: Elf 1
Wine Nymphs are a special sort of fae that only live in the bottles of very fine wine. Not all wines have these nymphs, but the one that do are especially coveted.
The nymph spends her time swimming and frolicking in the bottle of wine. They appear to be tiny pixie like creatures; exceptionally beautiful but no wings.
As the bottle is drained the nymphs inside shrink. One the bottle is empty the nymphs are gone as well.
They have no attacks and cause no damage. Their dancing and semi-disrobed flocking though act as a weaker Charm Person spell (victims gain a +2 bonus to their rolls). Once charmed the victims have only one desire, to drink the bottle of wine.
While the antics and stories of the wine nymphs feature in many tales from bards and skalds, some occult scholars believe that wine nymphs are actually a form of imp or demon, compelling us to drink and partake in wanton revelries.
One thing the scholar and the poet agree on is more, much more, research needs to be done.