It's exactly what it looks like in the photos. A thing to help squeeze out the contents of a tube. Specifically for hair gel/glue. Designed to look like a goofy Dracula with a Mohawk. Because that's why he has the hair glue obviously…

In this case, it was sized for Schwarzkopf got2b Glued Styling Spiking Glue 1.25 oz (yellow tube). It was then stretched out to fit Got2b Ultra Glued Invincible Styling Hair Gel, 6 Ounce (black tube) as well as the 6oz version of the spiking glue (now tested but not in photos).

Note:
The 2nd amazon listing looks different than what I have (shown in photos). So not sure if the size will be compatible! Refer to my photos for the best idea of fitment.

It is generally pretty easy to resize the model to suit your needs.

Enjoy, and happy styling!

Edit:
I've swapped out the original files with a newer version (V2) with a marginally narrower slot. I may wind up going to a V3 in some time that's even narrower if I ever bother.