[Pete from Shawnee Mission]

I understand if you have a heavy duty freezer bag and are careful bout the size of the corner you could put a metal piping tip in it and it would work almost as well as a real bag.

Food hack piping bag

One of the posters said that you should put tape around the tip in the corner or the tip will pop through.

[MomwithHope]

Good to know especially if you wanted very nice looking eggs.