Acetone-resistant clear plastic
According to Palstics International's Chemical Resistance Chart, the A-rated plastics (no solvent attack) towards acetone are:


ECTFE (Halar®): transparent films available 
Fluorosint® PTFE: white
HDPE: transparent films available
Nylon®, Type 6/6: white 
PP: clear sheets available 
PPS: opaque white
PTFE: white


Among these, polypropylene appears to be the only plastic that satisfies all criteria.