1) You can invest in a suit bag ($100).
2) You can use a suit cover that comes when you buy a suit ($2).
3) You can wear the suit jacket as a blazer (free).
4) You can gently fold the jacket and place it horizontally inside a tote bag that has a large enough opening that doesn't require any "stuffing."
5) You can buy a garment bag ($200)
6) You can put inside a rollerboard with the inside out fold technique.