Grimace's Shake (Pixiv Fanbox)

Ever since I saw Grimace's Shake it gave me a bad feeling. A smoothie that purple? It certainly is uncannily similar to unrefined mutagen. Wouldn't this be the ideal time for an unscrupulous organization (either McDonald's or the Mutant Mafia) to test a dangerous product? Well, @PinkFairy19 found out the hard way.