Kube Advanced Water Filtration System Compact Design: Kubefits neatly under your sink, leaving space for cleaning supplies and other items. Intelligent Monitoring: Kube's Filter Life Indicator measures usage, not time, to maximize filter life. Bypass Knob: Kube's convenient bypass knob allows you to switch between filtered and unfiltered water without shutting off the main water supply. Dual-Flow Twist and Lock Filters: Kube's dual-filter system maintains strong flow throughout the entire life of your filter.