Just out of curiosity why would you dump wash-n-wax mix into a Prestone container? Not being difficult, just trying to follow the logic. In another post you stated you're thinking of starting a detail business. Before working on other peoples vehicles, I might suggest you purchasing this book:
Mike Phillips? The Complete Guide to a Show Car Shine iBook - Download specifically Page 102, "Working Clean".
Another great plug for the IDA Certification, in which during the cert process you are tested on OSHA and Safety Standards, MSDS sheets, proper labeling and proper storage of chemicals.
Visitor is correct, dump that product. Take it to a local auto-parts store and discard it before you use it on some poor chaps vehicle.
For $15.00 you can go to the camping section of your nearest WM and get these containers to do your concentrate mixes: