display case
noun /dɪˈspleɪ keɪs/
  /dɪˈspleɪ keɪs/
(also display cabinet 
 /dɪˈspleɪ kæbɪnət/
  /dɪˈspleɪ kæbɪnət/
)- a cupboard made or partly made of glass, for displaying items in a shop, museum, etc.
- She asked to try on a necklace that was in the display case.