Okay so this maybe a dumb question to some but first time mom here! So I am planning on breastfeeding but she will have to have a bottle during the day some days. I am planning on using the Philips Advent (pictured below) I know nothing about bottles but just by looking at pictures and research it seems like they mimic the “boob” best. I have chosen to use the NUK pacifiers though. I can buy the bottles in 4oz or 11oz the bottles are around $20 for a pack of three so kind of expensive. I was curious I know she will only take an ounce or two at first and it will build over time. Could I buy just the large bottles and fill them with only the amount she’s eating at the time or will all the extra room in the bottle cause her more air intake causing stomach issues?