This is bottom portion of the cup / carafe for use with the Cappuccinatore on the Gaggia Cadorna Milk (and some other machines). This is not to be confused with the components for the automated carafe on the Cadorna Prestige. See links below for related parts and articles:

• Gaggia Deluxe Cappuccinatore Kit
  
• Gaggia Cappuccinatore: Frothing Device
• Gaggia Cappuccinatore: Milk Cup Lid
• Gaggia Cappuccinatore: Silicone Tubing 3.5x6 (5" in length)
• Gaggia Cappuccinatore: Spout (or Slide) Attachment
• All Supers: Pannarello Wand Attachment Replacement
• Gaggia Cadorna Milk Shoppable Parts Diagram