CASE AND SYSTEM

To provide a case which is portable and can suppress forgetting to use eyedrops and the like.SOLUTION: A case 100 has: a body part 10 where a holding part 11a holding a container body of a container 800 and forming an opened upper part; a removal prevention member 20 which is rotatably fitted to the body part 10 and is located at a first position covering an upper part of the opening of the holding part 11a and a second position that does not cover an upper part of the opening of the holding part 11a, depending on a rotation position; a display part 30 displaying a period when eyedrops have already been applied and provided in the body part 10; and a control part 40 which changes a period displayed to the display part 30 by rotation of the removal prevention member 20. When a user rotates the removal prevention member 20 from the first position to the second position and then rotates it to the first position for application of the eyedrops, the period displayed to the display part 30 is changed.SELECTED DRAWING: Figure 1 【課題】持ち運びが容易であり、目薬等の使用のし忘れを抑制することができるケースを提供する。【解決手段】ケース１００は、容器８００の容器本体を保持し上方が開口した保持部１１ａが形成された本体部１０と、本体部１０に回転可能に取り付けられ、回転位置によって、保持部１１ａの開口部の上方を覆う第１位置と保持部１１ａの開口部の上方を覆わない第２位置に位置される取外阻止部材２０と、目薬を既に点眼した時期を表示し、本体部１０に設けられた表示部３０と、取外阻止部材２０の回転によって、表示部３０に表示される時期を変更する制御部４０を有し、ユーザーが取外阻止部材２０を点眼のために第１位置から第２位置に回転させた後に第１位置に回転させると、表示部３０に表示される時期が変更される。【選択図】図１