My wife always enjoys bringing a one of those tiny bottles of red wine for hikes of a few days.
Being a bourbon drinker i also bring a flask of whiskey, preferably Knob Creek with me.
Ive also found half and half of vodka and rather strong country time lemonaid when its colder can be very enjoyable. It also seems to work wonders for helping the nerves after safely getting out of a bad situation and knowing your now warm, dry and safely in a camp with a fire going.
Whats your poisen?