I started a tradition of the "Wedding Bottle". My niece and her fiancé help out with bottling, so I filled it for them. It is a 6 liter Imperial bottle to be consumed during their wedding festivities.
I had to hand craft the cork out of a #6 cork stopper. I shaved and sanded the stopper until it was just the right diameter. I then hammered the cork in using a rubber mallet. I then used a dowel to counter-sink the cork below the lip of the bottle....
Here is the Imperial bottle (with a standard 750ml bottle next to it to show scale). The second picture shows my hand crated cork.