You will never taste a creamier gelatin than this Pineapple Colada Mosaic Gelatin recipe, made with coconut gelatin and a touch of rum encapsulating pineapple-flavored gelatin cubes. The easiest part of this gelatin is that it can be made in any glass dish you have. A useful tip for making gelatins is that to speed up the setting, you can place it in the freezer, but make sure it doesn't freeze.