This is a burger mold.
You put some minced meat with spices and some plastic wrap to protect it. It can hold about 150 g of minced meat, but you don't have to fully fill it. You don't have to freeze it to make a perfect hamburger, just squeeze it adequately.

It's stackable with the Eskimold in case you want to make you a hamburger with a popsicle after...

I hope you will love to do your own burgers!