Add the lychees, lychee syrup and lime juice to your shaker. Muddle a few times until all the juice has been released from the lychees. Clap the mint together a few times and add to the shaker.
Add the elderflower cordial along with some ice and shake for about 30 seconds. Double strain into your glass over ice and top with your choice of mixer Garnish with your choice of cranberries, lime and/or mint.