In The X Files Season 3, episode 13 "Syzygy" at approximately ~24:42, Fox Mulder is at a dingy motel and appears to be using a clumsy long metal spoon to attempt to put a thick yellow sticky substance from a dark brown cardboard canister into a mostly-empty bottle of vodka.
He then closes and shakes the bottle to mix the yellow substance with the vodka.
I presume this is some American product sold in hotels and, given that this episode contains a lot of references to odd behaviour which could be easily attributed to drug-taking, I hypothesized that it could possibly be an easily-obtainable substance with a known hallucinogenic side-effect when mixed with alcohol, but it seems odd that it would be in a can.
I also know that in parts of the American continent orange juice is sold in a can which is frozen, so he could be making a "Vodka Orange" but the consistency of the substance seems too thick and creamy and an extremely bright yellow.
What is this yellow sticky product they are depicting in this picture?