Flemishor South German,Nautilus Cup, 1575/1625.Shell, gilt bronze, copper, silver, and semiprecious gems;12 1/2 x 7 1/2 x 3 3/4 in. Purchase, with funds from Donald and Donna Baumgartner, M2002.170.Photo credit John Nienhuis. At first glance, the Museum's stunning Nautilus Cup looks like an impractical way to drink. Tankards and beakers, which are also on display…