I'm selling this because I bought it for my parakeet, Fuku-san, but the size was wrong. I think it's for birds with larger beaks than parakeets, like cockatiels or lovebirds... medium-sized birds. Please judge from the photos. The fourth photo is a comparison with Fuku-san's water bottle, so Fuku-san's water bottle is not included, lol. The diameter is about 1cm different, but the volume is quite different. The photos are everything. I will ship within 24 hours. It will be shipped by non-standard size registered mail. Thank you.