Liquid DeathFeastables fans already know and love the brand’s Peanut Butter Cups. But you’ve definitely never had them quite like this. In a chaotic internet crossover, Liquid Death and MrBeast teamed up to transform that classic chocolate and peanut butter flavor into a limited-edition sparkling water. Because why not?Now that the drinks are officially live, you can find 12-packs on Amazon or grab single cans in stores like 7-Eleven and Five Be…