Combine the frozen pineapple, coconut cream, lime juice, powdered sugar, and salt in a blender.
Blend on high until completely smooth and thick. The consistency should be scoopable, not pourable. If the blender stalls, add coconut cream 1 tablespoon at a time.
Taste and adjust the sweetness.
Transfer the mixture to a piping bag and freeze it for 30 minutes to firm up if it’s too soft to pipe. Do not overfreeze, or it will be too firm to pipe.
For each float, pipe Dole Whip in a tall swirl directly into and above the glass.
Pour 4 ounces of coconut water around the float, leaving room at the top.