In order to help the student expand his/her knowledge I will help answer the question. This in hope that the student will get a piece of knowledge that will help him/her through his/her homework or future tests.
The engineering that resulted in the redesign of eco-friendly plastic bottles was precision & Technical Reasoning. I think this is used when redesigning a bottle to take into account the measurements and the uses that this bottle can have.
Precision & Technical Reasoning
I hope it helps, Regards.