Lanterns are 5 sided boxes and do not have a bottom.  Vellum will be attached prior to shipment.  Lanterns are shipped flat and assemble within seconds with no gluing required.  You can secure the top in place using clear tape for a higher rigidity if you prefer.
LED lights are available at an additional charge.  Small lanterns receive 1 light per lantern while large lanterns receive 2 lights per lantern.