I ordered for my wife and myself large Pill Containers and also regular ones. We use the regular ones daily, because they are large enough even for calcium pills. We keep the large ones in reserve. These Containers are perfect for busy working people. You can take separate day units with you. The lids won't open by themselves. We used to have those grandma type of easy to open, 4 times a day containers, which are ok if you stay home all day and keep the container on your kitchen table. Would like to have different colour options so that we would not mix up the containers with my wife. Excellently planned products.