I didn't see any non-alcoholic cocktails available for purchase. To be perfectly honest, I do think all the cocktails available for purchase are pre-made and the bartenders are just pouring them, so you can't get a mocktail if you wanted.  However, each sample station has water to rinse your tasting glass. And there are additional water stations as well, so you could fill your sample glass with water and drink that if you need a break from rum.