Have tried the one from Pv,was ok but not tried the driphacks one,how would you describe the actual flavour of the souffle?Have seen it and always wondered.The only two raspberry dessert juices I've enjoyed are
Driphacks..
https://www.driphacks.com/raspberry-souffle-cheshire-creamery/?v=79cba1185463#
and of course..
West Country Dairy
https://www.primevapes.co.uk/products/raspberry-ripple-custard-50ml
Thought I'd mention them.. but you've probably tried them already :-)