lazy Susan

noun3

1. •
   A rotating tray (turntable) used on tables and counters for serving condiments or food.
2. •
   A rotating set of shelves used to minimize inaccessible space, usually employed in corner kitchen cabinets.

   • The 36′′ corner lazy Susan cabinet makes excellent use of corner spaces in a kitchen. — 2011
3. •
   Synonym of round trip (“form of barter involving selling and buying back”).