ENUK make inverted moulds (IM's), these are used how you can see in the video and stay on the nail when finished. They only come in six different sizes and still need pretayloring, there is no edge to stop product seaping out.
Popits are supplied by sweet squared, these are used in the same way as the video but are removed after the l & p is set, they are then rebalanced in the normal way or again using a popit.
Popits come in several different sizes so time isn't wasted pre-tayloring.
They have a built in 'skirt' which prevents product seaping out onto the clients skin.
Popits are also cheaper than IM's, you don't have to pay a stupid price just to get to see a website, they are re-usable which IM's are not. Popits can also be used with gel rather than just l&p like IM's.xx