Yup, can't really put dates on them, but they were common in the 1960s. I'm thinking the typical Kodachrome was yellow with a red top, but there were other colors -- maybe blue tops for early Ektachrome -- 'fraid I didn't file that data reliably. Ansco had stuff in a shiny aluminum can. I always liked the idea that metal cans were utterly light proof for carting exposed rolls around. Whereas over the last decade or two, the cans became black plastic and now pretty much translucent plastic, to me the latter seems needlessly risky.