Gotta be some uses for these...

PrimitiveMan said:
Soda bottles are made of polyethylene, I don't think you want to store fuel in them.
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It's worth some research. They are made of PETE, Polyethylene terephthalate.

[0002] Gasoline containers are made from polyethylene. A typical gasoline container experiences a permeation rate of about 30 g/m.sup.2/day, resulting in the loss of a considerable amount of gasoline vapor into the environment. This extent of gasoline pollution caused by this problem is so substantial that the Environmental Protection Agency has announced a directive requiring that losses due to gasoline permeation be reduced to 1.5 g/m.sup.2/day.

[0003] Polyethylene is a preferred material for gasoline containers despite its permeability, because of its other physical and chemical properties, including resistance to decomposition. One possible method of reducing the permeability of polyethylene is to coat the container with a material having a lower permeability than polyethylene. However, polyethylene has a low surface energy, and consequently a very low adhesion, which makes coating the container difficult. There are techniques available to increase the adhesion of polyethylene sufficiently to allow a coating to adhere with reasonable permanence, for example chemical etching.
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Worth looking into some more.
 
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