Custom socks, blanket, mask with photo

[Jea]

I want to add an offer on my store for my customer to be able to customize socks, blanket or face mask with their dog photo (or any other picture).. I'm looking for a service which can deliver worldwide..

Example of what I'm trying to achieve: https://gopupsocks.com/ 

Do you know how this works and how I could add this to my website?

thanks