1. Dripless design prevents habitat from getting messy
2. Top-fill opening and locking base make it easy to refill while attached to habitat
3. Volume measurements, floating level indicator and clear plastic make it simple to monitor water levels and intake

Small (15oz): Dimensions (includes packaging) (LxWxH): 4.5" x 5" x 12.5"

Medium (20oz): Dimensions (includes packaging) (LxWxH): 4.57" x 5" x 14"

Large (34oz): Dimensions (includes packaging) (LxWxH): 4.57" x 5.5" x 16.25"