Mudder's milk is an awesome plugin that brings the side effects of alcohol to minecraft. On Creeper Country drinking milk causes some interesting things to happen.
When you drink your first bucket of milk you will begin to experience the drunken effect. When you drink two buckets of milk you will receive a message saying You are starting to feel drunk. When typing in chat your your text will be jumbled and at the end of sentences a "...hic" will appear.
As you drink more buckets of milk your word will swirl and you will begin to stagger. Be careful with the amount of milk you drink. Too much milk will cause alcohol poisoning. This will cause you to loose some health and be nausea for a few seconds.
After a few minutes of not drinking milk the side effects will vanish and you will receive a message saying that you are now sober.
Be aware that when you drink a bucket of milk the bucket will disappear from your inventory.