The Water Bag by DCI • $4.50 each • Heliotrope Since I don't have a car, when I go out with my son I carry everything we might need for our outing. And usually my bag gets heavier as the day goes on. But wouldn't it be great if your bag could get lighter? If taking a water bottle or two is part of your out-and-about routine, consider switching to a Water Bag. BPA free, reusable and can be folded or rolled when empty.