It'd have to be our fearless co-leader, Andy*; together we'd get off the island pretty quick I reckon, and if not, we'd nerd out on martech until rescued so time would fly :)

*Normally I'd choose Harrie, but she is otherwise engaged with baby #2.

On the proviso that this extends to food of the liquid variety, it'd have to be the golden hues of beer. I'm sure there are golden coloured foods that could sustain me when I get sick of beer (cheese is kinda golden, right?!)  

If we're talking purely food, then green; I'm definitely an omivore, but my body tells me when I don't get enough greens. Also, avocado; despite what Bernard Salt says, smashed avo rules (and you don't have to eat it at a cafe...)