BLASANI Concealable Cruise Ship Rum Sneak Flask Kit Set (4 X 32 oz, 2 X 16 oz, 2 X 8 oz) Nonmetallic: Undetectable to metal detectors or X-Ray scanners Screw top: Convenient leak proof screw top Durable: High quality food grade plastic is odor proof, leak proof and puncture resistant All purpose: Perfect for camping and concerts