Fermenting in a water jug

I got this water jug and want to know if it would be a good idea to ferment in. It’s a number 7 plastic. If I can use this as a secondary fermentor that be great!

I would assume that it is food-grade, being a H2O jug. I’ve used various 5 gl buckets (all were pet food-grade plastic) used as secondarys. Just use your sanitization and cleaning practices, and figure out an airlock or blow-off tube that will work.

Namaste!!!