Cement mold Ashtray Half-Life 3

This is a Half-Life 3 ashtray mold for making a cement ashtray.
I used a fast-drying cement with no stones in it like thise one: https://www.amazon.de/gp/product/B007RXALKW/ref=as_li_tl?ie=UTF8&camp=1638&creative=6742&creativeASIN=B007RXALKW&linkCode=as2&tag=tamperold-21&linkId=5edf3bd9ff217305a7d934cb2ae2292b

You will need 4x M5 25mm screws to build the mold together and a bit of vaseline.
The vaseline is for the inside walls to get it apart.