A tanker truck pulls up at your house filled with your favourite liquid thing. What is it?

I’ve never had it before caffeine free diet Mountain Dew. I developed sleeping issues a few years ago so I avoid it like the plague now but I used to love the regular caffeinated version. If the caffeine free version is even close than I’m game. I know it exists, you can buy it online but it’s expensive and I’ve never seen it in stores. I’d love to pick that habit up again.