I haven't had any problems with the tips coming off but maybe the cones (when they come in) will add support to them in a purse or pocket. Right now I put my setups in a case for protection when I carry them.
But if you do, you can File the Top of a Regular Cone to make the Top Diameter Larger to except a CE2 Style Clearo.
Or you can place a piece of Sand Paper on a Flat Surface and drag the Top of the Cone over it like the way you use and Eraser on a Pencil.
But one of the First things I learned about a CE2 is that it Needs to be "Tilted" when you take a Hit. And Every time I would tilt, I would see the e-Liquid that was left in the Clearo as it Pooled around the White Ceramic Cup. So a Slot in the Cone wasn't all that Necessary.
The Cover in the Vid does Look Cool though.