In my family, since my sister (19) is physically and mentally handicapped, we bought some cups from Tupperware that have lids with holes for straws. She uses those all the time. Therefore, my nephew, who is 8, uses one whenever he is watching TV. He tends to forget that he has a drink and will turn it over. In restaurants, we always order my sister's drink in a "to-go" cup. Sometimes, the waitress will bring my nephew's in one as well since he looks much younger than he is. He prefers to have a glass like everyone else but usually doesn't complain. So I guess the answer to your question is that my nephew still uses a cup with a lid at age 8 whenever he is not at the table.