Used only once when purchased. It's a size that fits a 500ml plastic bottle. Please check the images and only proceed with the purchase if you are satisfied. ◆Notes ・I have a cat, so there may be cat hair. ・I will try to pack carefully, but it is amateur packing. ・Please refrain from purchasing if you are sensitive to this. ・Due to work, it may take about a week to respond to inquiries and ship after purchase (after payment).