I've tried every cup they make. He Cant figure out the straw, and he'll chug out of the spout sippys all day long if you hold it for him, but if i make him do it, he doesn't tip it back far enough and he just gets mad and throws it in frustration . How's kind did utter taker your lo to catch on. My other kids had no problem. But this guy is the pits at drinking!