It's the official popsocket grip for magsafe. I have yet to run into an issue where it disconnected when I didn't want it to. I have to make an effort to remove it, and would guess it's roughly as strong as the one you posted.
Never tested with a drop though. Pretty sure you can stop by your local target or best buy and test it out to be sure.
Also have one of these and it sticks on very strongly https://www.amazon.com/dp/B098DWZ4Z9/ref=cm_sw_r_apan_glt_i_J8QPFZXNHV55YNMB765A?_encoding=UTF8&psc=1
Been using this one since I got my Ultra