Squeeze about 7 pomegranates. Pour 900 ml pomegranate juice and 300 ml orange juice through a sieve into a wide pot. Stir in 1 packet of bourbon vanilla sugar and 400 g sugar. Bring everything to the boil and boil down over high heat for about 20 minutes until syrupy. If necessary, skim off any excess water and pour into a clean bottle immediately. Let it cool down.