50 pack of Black Opaque Pop Top vials, which adhere to strict quality and compliance regulations. Pop Tops are CPSC certified and meet STM standards.;Medical grade, and the most convenient way to store pills and other medications.;To open the Pop Top bottles, firmly squeeze on both sides, which makes the pop sound. These superior bottles and vials produce a strong pop, which shows the quality and tolerances of our vials. Our Pop Tops are all opaque,;Specificatons: 13 dram - 2 grams per bottle CPSC Certified Opaque Black Color 8 x Pop Top Bottles Shipped Fast and Free by USPS First Class Package in Plain Padded Envelope