The dual chambers inside hold different liquids. Each chamber has its own vent hole (see graphic). ­­­ By strategically covering or uncovering the vent holes, the pourer can control which ...
It’ll have a sealed, dual-chamber cartridge (similar to what’s in the Ranier), with 6061 series aluminum to save costs. That lets them come in at just $159, and it’ll have a 200mm travel option.