Before I studied in the UK for a semester, blackcurrents weren’t even on my radar. I discovered that basically everything purple that would be grape-flavored in the US is blackcurrent-flavored in the UK — even the Skittles.
I miss blackcurrent juice and blackcurrent sweets, but at least I can get blackcurrent tea! It’s a perfectly nice fruity black tea. I generally throw a sugarcube or two in mine.