Excellent point about the potential for off gassing....Oh! I'll add that if you really want to use plastic or DIY, which I would be leary of (outgassing) without knowing it's chemical make-up, do a search using term "Perforated Plastic" with panels, boards, sheets as modifiers.
Click here to register for free. You'll gain full access to all features. If your account is not activated within 24 hours, contact us at contact@cigarpass.com with the username you are inquiring about. Thank you...