Hollow
To make citrus ice cubes: Take 1 orange and use a peeler to create small orange zest peels to curl up and put in each tray. Take a second orange and cut in quarters, then cut each quarter into small triangle slices that will fit in the ice cube tray. Freeze.
To rim glasses: Mix the 2 tablespoons cinnamon, ¼ cup sugar in the raw, and 1 tablespoon allspice in a small bowl and then pour evenly onto a small plate. Rim each glass with orange slices to create a wet layer for the sugar mixture to stick to. Roll the rim of your glass into the cinnamon sugar mixture, add a few citrus ice cubes to your glass.