I don't do cups with no lids for the most part, definitely not with any kids under 2. I have the cups with the straws that I got from the dollar store. In summer when we go outside for afternoon snack I give all kids their water in an open cup and that is how we practice because then it isn't a big deal if they spill. In the house it is closed cups for all kids with their water. Their cups sit on the table all day. When I give the kids their milk those over 2 get it in an open cup, those under 2 get it in their sippy cup.