We have three 5oz tommee tippee bottles that SO uses when I'm at work in the evenings to feed LO. We also have an unopened package of three 8oz tommee tippee bottles... I'm wondering if we should even keep these since I've read that EBF babies may not even take more than 5ish ounces at a time. Should we keep 'em or take 'em back?? TIA!!