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PET containers are usually formed at the bottom or side, with a triangular "chase arrow" symbol around the number 1 and the abbreviation PET or PETE below the triangle. Only PET carries an identification number 1. Source:   https://www.fortuneprintings.com/xinwenzixun/zhihezhishi/376.html

PET is a valuable packaging material because it is strong, lightweight, non-reactive, economical, and shatterproof. The safety of pets in food, drink, personal care, medicine and medicine is recognized by world health authorities. Source： https://www.fortuneprintings.com/xinwenzixun/zhihezhishi/375.html

PET containers are used to pack soda, water, fruit juices, salad dressings, cooking oil, peanut butter, shampoo, hand sanitizer, mouthwash, medicine, and even tennis balls. Virtually all single-bottle and 2-liter bottles of carbonated soft drinks and water sold in the United States are made with PET. A special grade of PET is used for portable food containers and can be heated in an oven or microwave. Source: https://www.fortuneprintings.com/PET_Bottle/

 PET Boston Round Bottles with Caps These bottles are useful in transporting and storing many liquids and their clarity makes it easy to view the bottle's contents. PET Polypropylene cap with F217 liner Tough, lightweight & virtually unbreakable Meets FDA standards Source ： https://www.fortuneprintings.com/PET_Bottle/