The Flying Saucer (フライング・ ソーサー?) is a treasure exclusive to the Japanese version of Pikmin 2. It is a Kuriomoto-brand milk cover, and can be found in Hole of Heroes on sublevel 9, inside a Fiery Bulblax. In the US version, the Dimensional Slicer can be found here, and in the European version, the Patience Tester.
Collecting the treasure