Gosh, what I used to use (43 years ago) was a safety pin holding a thin baby blanket or cloth diaper over my shoulder.
How things have changed...but even at this date and time I still hear older women trying to convince their daughters that breast feeding was for "Peasants" and were only showing that you couldn't afford to buy milk for your baby!!! My own mother was like that, always on my case when I visited or saw her in town, as if I was going to whip out a boob and cram it in the kids' mouth in front of everyone. She was still ashamed that since she gave birth to me at Grandma's place and in the depression could not "afford to feed the baby correctly," she had to breast feed me!!
Honest, there are still some out there like that!!!