I modeled a one piece snap lock box and printed it in Sainsmart TPU filament ( Glow in the Dark ). I used the cross support "everywhere" and cleaned up the finished model as best as possible. Probably need to raise the support percentage. Hollow inside. Note the hinge. Lid semi-closed. Note the hinge at the upper right. Lid snapped shut. It was printed in one session and then cleaned up using a thin spatula and needle nose pliers.