This elegant Coffee Press tool was developed to solve one of the biggest coffee brewing problems: agitation. Unintentional movement or agitation makes the extraction inconsistent and results in bitter coffee flavors. To solve this, the Delter has a unique Jet-Seal that keeps the water and coffee grounds separated, preventing any unintentional agitation. Water contact is activated by applying pressure to the Jet-Seal. This ensures you can brew with complete control over water flow and movement within the brew chamber and produce a cleaner cup, avoiding those bitter flavours.