Almost all alcohol shoots through me pretty fast! Like others have mentioned above, the fullness in the bag might be due to the amount of sugar in alcohol. Alcohol that tends to have lower sugar are spirits---gin, vodka, whiskey. Try to drink them neat or on the rocks. Cocktails tend to have loads of sugar so it'll fill your bag up faster. Even tonic water for gin and tonic adds to the sugars in a drink.
If I'm going out, I usually stop drinking about 45 minutes before leaving and empty my pouch just as I'm heading out. I also eat potato chips while I'm having drinks to try to slow things down.
And yummy Baileys? I only tend to drink liqueurs at home, close to my own bathroom!
Cheers,
Kismet