Jujube BFF diaper bag, help!

Hannah • Canadian momma to a sweet 10 month old boy 💙 expecting baby number 2 in May 2017 !
Does anyone use the jujube BFF diaper bag? Would it be large enough for a newborn and 18 month old? Newborn will be breastfed, older child will likely be on sippy cups by that time.. disposable diapers. Any input is appreciated. I've been obsessed with the bag lately (watching YouTube reviews etc) but I don't live somewhere that I can actually see one in person until I order it and it shows up! I was considering the be prepared instead but I want something with backpack straps so I can have my hands free without killing one shoulder with a messenger strap.. thank you!