After much deliberating... we agreed on "Minion"
The checklist... we followed...
a) tupperware box - shoebox size
b) his entire front is actually the lid for the box - it counts as "an opening"
c) he wrote his name on the front
d) all prior writing is covered
e) his eye (lid to a nuts cannister) and arms (plastic toilet paper roll disenpers) are 3-d
f) theme? MINION.