To fill the tubes, you can prepare a cream, I give 2 types of cream.
Cook the protein cream for a couple. Put a bowl with whipped protein on a steam bath and add powdered sugar at 1 speed of the mixer. Once all the sugar is added, switch the mixer to 2-3 speeds and beat until stable peaks, 10 minutes. The bottom of the creamer should not touch the water! Food dyes are added to the finished cream.