Turns out there's no specific age or stage to make the switch. 43% of parents went from bottles to cups when their little ones were 12 to 18 months old, while 30% of you tossed the bottles at 6 to 11 months of age. 12% of the parents polled made the switcheroo at 18 months and the final 15% said, "What switch? We're still using bottles." Just goes to show, parents know what's best for their baby.