These pre-cleaned round narrow-mouth bottles come in two levels. Level 1 bottles are lot controlled, sealed with custody tape, and include a Certificate of Analysis from an independent laboratory.
Level 3 bottles meet EPA guidelines, but do not ship with a certificate of analysis—ideal for general-use.

Included caps are composed of polypropylene (PP) and lined with F217, a low-density foam core between two solid layers of LDPE.