my daughter was (about 8 months) excited at the beginning to be able to drink from the cup itself. But after a few days they did not want and would rather drink from larger cups or glasses it. The narrow end is not ergonomic on the mouth or lips, so that kept running out of his mouth. The round end is more suitable to drink like a normal cup, when tipping but interfere at a certain inclination angle, the other upward higher and narrow current end in nose height. Expected more me, the cup would probably not buy.