Sweet and nasty though it may be, I think Thunderbird has achieved a kind of kitsch status shared with Babycham and Woodpecker Cider, also "beginner" drinks. There's something of the Route 66, rock 'n' roll, road movie about it too. And the bottle is (or was) a bit like 1950s obscure glass or a Pelikan celluloid pen, with those stripes.