The fastest way to chug
is with a bendy straw
Place the straw in the neck of the beer bottle
and bend the tip around so that it points at the base. This way when you drink air will flow in the straw and allow the beer to flow out
If you can conceal the straw you are that much more impressive to your spectators.
"But achan, what about cans?"
You don't really drink beer in cans do you?