I'm looking to buy a speaker i can play my iphone 6s on, currently i'm using a UE boom, BUT?

It isn't quite loud enough, i work in a warehouse so machines are loud and what not, but there are other people i see with speakers that are pretty loud but i pass them on my way through to work, any ideas on which one i could get?

gotta be useable while charging, iphone capatable, must be portable also.

A pill speaker. You can get one at walmart. They are red & black.

Hi so long gone are the days of the old ghetto blaster. Annoying other people with your music.

JBL "Flip" or "Charge" series.