Most domestically produced archival-quality exhibit cases are manufactured using acrylic as opposed to glass. Acrylic showcases are easier to manufacture and are lighter weight than glass showcases.
Museum
DIY Custom Display Case From Scratch
Anatomy of an Exhibit Case: Acrylic Showcases
Custom Acrylic Display Cases
Pedestal Cases Archives - SmallCorp
FantasMall Display Case/Box for LEGO® McLaren Race Car 42141
Showcase in tempered glass, with a square base
WANLIAN Clear Acrylic Display Case Assemble Countertop Box Cube
Gundam acrylic display cases, Hobbies & Toys, Toys & Games on
3-Shelve Rotary Lockable Acrylic Display Cabinets with Lights
Anatomy of an Exhibit Case: Acrylic Showcases