Four miners, trapped over winter in a mountain cabin, run out of food, but three people in a love triangle show up from the future with a couple of candy bars, a flask of drink, and a feud.
“Oh, well—” He runs his pasty white hands through hispockets while Cole and the girl do the same. “I have a candy bar or two, I believe,” and he brings them out. “Cole, you have a bottle, don’t you?"

The guy with the black hat scowls at him, but brings a flask out of his hip pocket and lays it on the table.

Variants

(1)
  1. “The Dead of Winter” by Kevin O’Donnell, Jr., in Asimov’s Science Fiction, May 1979.
    2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . written by [Error: Missing ']]' tag for wikilink]