i have a couple of Kanger Mini's. there great little tanks but i would advice taking it apart and removing the top wick or wicks. you will get a better vape from it, and when i say a better vape i mean its 100 times better!
as for the "drip tip". they do that because, firstly its better when you clean the tank that you can take the tip off and get right in to all the bits and peaces to get the flavor of the former juice out and second, i don't like metal tips, and i know a lot of other people don't like them as-well so its there to give the option to take it off and put a plastic or rubber tip on.