This is a glass fruit fly trap that was used until the early Showa period. If you put a sweet and sour liquid in the groove at the bottom of the dome, fruit flies and flies will enter from the open gap at the bottom. Since the top of the dome is sealed with a glass stopper, the fruit flies cannot escape and accumulate in the groove. To dispose of them, simply remove the glass stopper and discard the liquid and the trapped flies. I used to mix vinegar with wine or apple juice and place it in the kitchen to catch fruit flies that would appear in the summer. However, after renovating my kitchen, I no longer have fruit flies or flies, so I stopped using it. How about this for those who have pets or small children and don't want to use pesticides? It can be reused, making it eco-friendly. This glass fruit fly trap has a high design value, and a reproduced version is currently available as a glass craft. When not in use, it can also be used as a flower vase, or simply placed in the kitchen as a stylish object. Width: approx. 13 cm Height: approx. 15 cm Thank you for looking.