Mlikero Card Deck Cases, 6 Pack Acrylic Commander Deck Box Holding 100+ Sleeved Cards with 6 Dividers, Clear Card Storage Box Fit for MTG, TCG, Sports Cards

Gamegenic Sideholder XL 100+ basic plastic These Boulder styled knockoffs https://a.co/d/0gRRvSw9

I use those shitty clear acrylic deck boxes and put a celery rubber band around them so they don't randomly fall open. amazon link

If you are looking for a budget option, you can get 6 clear deckboxes for less than $20. As long as you aren't slamming your bag around, they hold up pretty well. Also look cool for displaying your decks: https://a.co/d/0bTrBG4E