We always bring a soft sided cooler that we hang on the stroller. Our cooler always has bottled water (we usually freeze one to keep everything colder), soft drinks, and juice boxes. We usually have snacks, which vary but typically include some of the following: , Gogurt, squeezable fruit pouches, cheese sticks, goldfish, chips, pretzels, apples, oranges, granola bars, cookies, animal crackers, pop tarts, candy like twizzlers, jelly beans (anything but chocolate), etc. We try to balance it out with some healthy options (fresh fruit) and fun options we don' t usually have at home (poptarts, cookies, candy). It will be a sad sad day when we no longer require a stroller making carrying our cooler much less inconvenient, but since we have a 3 year old and a baby on the way, it will be a while.