50 pack of Gold XITTM opaque Pop Top vials, 13 dram which adhere to strict quality and compliance regulations. Pop Tops are CPSC certified and meet STM standards.;They are 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 these vials;These Pop Tops are all opaque, which blocks UV rays, and our medical grade plastic is BPA free and made of FDA-approved material! Great Price!