观察桶底“PC”标识。由于水桶一般是要回收的,所以国家规定,厂商必须使用PC桶作为桶装水的水桶。PC是一种食品级材料,它的安全性较高,可以直接装开水而不产生有害物质,但价格也更高。而有部分企业为了降低成本会使用更便宜的PET材料,PET材料不耐热,在阳光直射或者加 Observe barrel bottom “PC ” logo. As the bucket is generally to be recycled, so the state regulations, manufacturers must use the PC bucket as bottled water buckets. PC is a food-grade material, it is more safe, can be directly loaded with water without harmful substances, but the price is higher. While some companies will use cheaper PET materials in order to reduce costs, PET materials are not heat-resistant, in direct sunlight or plus