How to carefully transfer the cream into a pastry bag with a nozzle, without dirtying yourself and everything that surrounds you? First prepare a tall glass or measuring cup from a hand blender. Take a pastry bag with a nozzle in your hand, and twist it once with your other hand once at the junction of the pastry bag and nozzle. Then, put the bag in the glass with the nozzle down so that the nozzle lies on its side and the twisted end does not unwind. Pull the wide part of the bag onto the glass so that it completely fits it inside and out. And voila - you can slowly fill the bag with cream!