Selecting the correct material is critical to prevent container degradation. PET (Polyethylene Terephthalate) is ideal for cosmetics and general cleaning due to its high clarity and impact resistance. For harsh chemicals, solvents, or industrial degreasers, HDPE (High-Density Polyethylene) is preferred because of its superior chemical resistance. If your product is light-sensitive, such as certain essential oils or pharmaceuticals, prioritize Amber Glass or Opaque UV-protected plastics to prevent product spoilage.