Thinking to buy one Gubby baby nappy bag, but just don't know which one is more suitable for outgoing, we don't have car in China, so we need to take public transport whenever we go out. That's why a bag for putting baby's stuff is must now. All the while i like Gubby, but there is less choices in KK, i like the backpack with red color, but out of stock. Which one you prefer? The sling over the shoulder or backpack? I feel like the backpack is more suitable since i need to carry baby.