This is a flexible version of polyethylene that is commonly used to construct squeezable bottles. This is also another version of the bottle that is popular among cyclists, day hikers and marathoners. Its recycling number is 4 and its low weight, durable and flexible.
Low Density Polyethylene or LDPE is alike in composition with HDPE. The only differences lie in its deeper lucidity, its more yielding nature and not as chemically resistant. However, LDPE bottles are more expensive than HDPE. Polyethylene Terephthalate, or more commonly referred to as polyester, is universally utilized for beverages which are carbonated and also as water bottles. Polyester is the plastic of choice because it has excellent alcohol and vital oil obstruction properties, plus its durability against shock and tensile strength is undefeatable. Polypropylene or PP, has an elevated constancy when exposed to high temperatures, which is why it is ideal to house warm liquids such as syrups. PP has a superb chemical resistance and can take heat for up till 200F. It is unsuitable to house liquids of cold temperature.
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