CF and SD cards holder

I created this card holder for my sisters who is a photographer.
This splinting box can hold 4 SD cards and also 4 CompactFlash cards.
It was inspired by this types of product : https://www.lelong.com.my/waterproof-4-cf-compact-flash-memory-8-sd-card-storage-case-holder-base7632-184555735-2016-11-Sale-P.htm