Instead of piping bag, lunch bag with spout
I have a little trick on how to quickly fill a piping bag and later have no work cleaning the piping bag. Namely, a breakfast bag with spout.
In a breakfast bag I cut off a small corner and place there with some pressure the spout.
Then I put the bag in a container, which has about the same Umpfang and fill it.
Now I just need to say it carefully, take out the nozzle and can then discard the bag. The quite expensive cleaning of the reusable bag thus eliminated.