Rancilio Bottomless PortafilterThe Rancilio Bottomless Portafilter transforms your espresso practice by removing the guesswork. With no spout obstructing the view, you watch extraction unfold in real timeseeing channeling, uneven flow, and puck quality instantly. This diagnostic tool is essential for intermediate and advanced baristas refining technique on Rancilio machines like the Silvia, Silvia Pro, and Classe series. The new ergonomic handle improves comfort during high volume