With states quickly moving to ban Four Loko and other caffeinated alcoholic drinks (and the FDA looking into a wider prohibition) the drink&amp;#8217;s producer says they are dropping caffeine from the recipe. I&amp;#8217;ll admit to not fully understanding the phenomenon; in a moment of curiosity last week, I tried the Four Loko &amp;#8220;purple drank&amp;#8221; garbage [...]