Why Glass containers for Homeopathy? Plastic containers are reactive and leach into the substances stored into them. Due to this property of plastics, the U.S.F.D.A. has classified plastics as “Indirect Additives” i.e., though they are not directly added to the substance stored in them, they definitely seep into the contained substances. When plastics is exposed to homeopathic sustances, its content is bound to dissolve some of the numerous chemicals in the plastic and that in turn is bound to distort the structure and action of the active ingredients present. There is no such problem with Glass container and hence recommended.