I like the Ultra Pro clear 2-piece deckboxes. https://www.amazon.com/Ultra-Pro-2-Piece-Gaming-Products/dp/B004LBGL34/ref=sr_1_25?keywords=ultra+pro+deck+box+100&s=toys-and-games&sr=1-25

Since Dragonshield stopped making theirs for some reason, these are the next best ones.

A big reason I like these is if you have curved foils in your deck, just stuff in enough cards to make the fit tight and they will flatten over time. And also squeeze the air out of your double-sleeved cards.