I relied on bottles the whole time my kids were little, with the exception of a little breastfeeding with the first two. When planning an outing, I'd stick a bottle or two into the diaper bag, and away we'd go.I just remembered that my daughter would use a pump to fill a bottle and take it out with her if the baby needed to be feed and even if I watched my granddaughter my daughter would bring a bottle for me to feed the baby.
I have utmost respect for the mothers I've seen who go out of their way to be discreet and to cover up when breastfeeding. There's a lot to be said when it comes to class.