Product Description:Safe self-locking cap, thickened hard HDPE, can be matched with corrosion resistant PP red cap and blue cap.Classic burglar-proof cover, fine workmanship, thick products, never jerry-building, there are no products of the same type on the market, varieties are currently 175 ml, 250 ml, 500 ml, 1000 ml, ml.2000ml.3000ml.Advantages:1.Safe self-locking cap, thickened hard