Select the right glass [a "highball glass" means no larger than 10oz], appropriate and delicious rums, and take time to properly dissolve your powdered...
I'm thinking this may have been more refreshing on a warm afternoon, but I felt that the soda water made this one a bit too watery for me. I love the interplay of rye and rum (and rhum!), so that was enough to get me to try it again -- next time with 3/4 or 1 oz of soda water instead.