(Woo, train wi-fi!)
It's not that Sandy didn't drink. It's just that, at his constitution, you have to be careful about it. And since he shared Silverpine's love for root beer, there just wasn't much occasion to. Pardoning the multiple occasions the Cap'n slipped him ale when he wasn't looking...
In any case, Sandy happily sipped the wine, feeling his worries get all fuzzy and out of focus. It felt...good. "What sorta wine is this, anyhow? It's none too shabby, I'll give it that."