Another round of stupid noob questions…

I discovered the no-chill concept, and seeing the cost in money and water of the spiral-copper-thing, I am really enthusiast. One less useless stuff

I would like to keep things really simple for starters, and I wondered…
1) is it possible to use the "no-chill cube/jerrycan" as a fermenter?
I read you were supposed to rack the beer in a proper first fermenter, then a second. I also read that one single fermentation is ok for noobs… but is it ok to pitch and ferment in the no-chill cube?
2) what kind of plastic make a good and very safe "no-chill cube"? HDPE? PP5?
The kind of thing sold as fermenters around here seems on the cheap side, and I am not sure I could pour 100° wort into without risks (melting or diffusing nasty chemicals into the beer). Am I overthinking?
Thanks again for your time and advices, it is really a nice place
