potable: drinkable; also, a beverage, especially an alcoholic one.

"Shut up, you fat trout," she yelled at her across the bar.
"It's time to leave," the small, bespectacled barmaid replied. "Your husband's waiting."
And so he was. The poor man was clearly useless at dealing with his wife, which was probably the only reason they were still together after thirty years. His face looked like a worn doormat, with a thick bristle across the middle, and curly tufts all the way around its edge.
"Jesus, Sharon, your sweat's potable," he said, veering from her at the same time as grabbing her at the elbow. "How much has she had?" he asked the barmaid.
"I don't know. I only got on at eight, and she was pretty well gone by then."