Cut the oranges in half and press them over a juicer.
Then, remove any of the seeds. If you do not like pulp in your juice, pour it over a mesh strainer with a large bowl underneath of it.
Pour freshly squeezed orange juice evenly into 4 glasses and top with sparkling cider or non-alcoholic champagne.
Add in fresh cranberries and garnish with a sprig of fresh rosemary.