Cobalt Blue PET is becoming popular in the vitamin and nutritional industry because of its pleasing color and excellent UV protection! For vitamin and nutritional products that are sensitive to sunlight and tend to degrade and lose efficacy when exposed to UV for any length of time, Cobalt Blue is a nice alternative to Opaque White or Amber! Some Cobalt Blue Packers can be run in minimum orders of as little as 10,000 units!