Not all plastics are the same, so what the containers of a particular liquid are made of may well be safe with that liquid, but that doesnt' mean that any other plastic would be.
As an example, HDPE (commonly used for containers for assorted liquids) is very resistant to a number of things that styrenes are not. There are many other kinds of plastics, and some of them will be resistant to things others are not, and some may overlap in resistance or lack thereof.
As an example, HDPE (commonly used for containers for assorted liquids) is very resistant to a number of things that styrenes are not. There are many other kinds of plastics, and some of them will be resistant to things others are not, and some may overlap in resistance or lack thereof.