I have a rather large plastic bottle of isopropanol ($99.7\%$), and I wanted to store some of it in a smaller, more handy container. I have two empty plastic bottles from contact lens solution that I wanted to use, but I'm not sure if it is safe for storing them in there for longer periods of time.
One of them has a 01 symbol inside a triangle, from which I concluded that this means PET and it also has a number 3 inside a circle (I'm not sure what that means).
The other one is HDPE (2 in a triangle) and has a number 5 elsewhere. Are both of those safe for long term storage of isopropanol?
I do intend to mark them very clearly.