What can we call this round shaped plastic container?
It's commonly called a pill bottle, as suggested, but it is called a pharmaceutical round bottle by this supplier (where I've bought bottles from for my business, and they know their business; I can attest to that).
Click on the links below for photos and more specific descriptions (such as HDPE Wide Mouth).
Specific type: https://www.sks-bottle.com/340c/fin37d.html
By the way, I buy other kinds of bottles from them. I found pharmaceutical bottles by searching for "pill bottle" on their website, so they know that is a very common term for them.