Lightweight and compact 0.6L portable water filter, ensuring clean water with easy operation. - Brand: KATADYN - Model Name: BeFree - Capacity: 0.6L - Features: Shake, Swish - Mouth Diameter: Standard bottle mouth diameter Thank you for viewing. Used only once. Cleaned and stored carefully. Please refrain from purchasing if you are concerned about minor imperfections due to it being a used item.