If caffeinated alcohol is banned in the US, how are canned whiskey and cokes sold?

FDA targeted 4Loko in 2010 and banned caffeinated alcohol drinks from being sold. But I still see drinks sold in cans that are technically (lightly) caffeinated like canned Jack and Coke. At bars, I can even order myself a red bull with jager. Not sure if it would be illegal to sell a canned version? That has always been normal. Ive seen coffee based drinks that are probably caffeinated. But for some reason the FDA made a huge fuss about 4Loko.