Trading card organizer insert for Filament boxes

UPDATE: Ovals model cuts down about 50% material and about 3 hours of time. Idea credit for the ovals goes to @Dazden

Hi everyone, 

This is the first model I am publishing here! I originally designed it to fit specifically the Polymaker flip up boxes but it does fit several other brand boxes I've tried it in. 

This model fits both Pokémon and Magic the gathering cards. Each slot fits about 100-110 cards. When you close the lid to the box, there's no worry about the cards falling out or shifting in transit. 

I used 2 walls, 15% infill and I printed it in PolyTerra Black. 

There are no supports needed for either model. I tried to reduce the filament consumption by introducing hexagonal cut outs but it still consumes around 300-350 grams of material depending on your settings. If you guys have any ideas how to reduce this further, let me know please and I'll add the new model!