Questions about the Zaishen Supply Masters

First time poster, long time visitor.

Anyhow, where do you get the Zaishen Medallians? Its not listed in the GuildWiki and I did a search of the board and haven't found it.

What does Flask of Firewater do?

Edit: Nevermind - I guess I misspelled it.

They were earned during the Nightfall PvP weekend event. The supplymasters have returned, apparently because some people didn't get a chance to redeem their goodies. You can no longer get them, at least until another event or update.

The flask of firewater gets your character drunk.