I've used this for about 1.2 years, and it's been sitting unused. I've also put in vitamins prescribed by a doctor (for the bird?). I will clean it as thoroughly as possible before shipping. As this is a bird product, there may be feathers, food, etc. attached. [Product Overview] The clear waterer with markings is the perfect waterer for raising birds. It has a 50ml capacity and a compact size. [Functionality] It has markings of about 1cm, allowing you to easily check the water level. It's made of plastic and has a lightweight and easy-to-handle design. [How to Use] Simply attach it to the birdcage for easy use. It can be kept clean and supports the health of your bird. - Product Name: Clear Waterer with Markings - Capacity: 50ml - Size: Approximately 1cm markings - Material: Plastic Thank you for looking.