This ultimate box leaves nothing to be desired! There is space for everything you will need, with compartments for multiple card decks and cases, two play-mats and accessories like dice, tokens and life counters!
Some examples of what this amazing box can hold:

For 5x UG Sidewinder™ 80+ or 4x UG Sidewinder™ 100+ plus extra storage space
For 5x UG Boulder™ Deck Case 100+ or 6x UG Boulder™ Deck Case 80+ plus extra storage space
For 550+ double-sleeved cards or 650+ single-sleeved cards or 1100+ unsleeved cards*
For 2x UG Flip’n’Tray 80+ or 5x UG Flip Deck Case 80+ or 4x UG Flip Deck Case 100+ plus extra storage space
For 230+ Top-Loaders (standard size, 12 mil)
For 5x UG Deck Case 100+ or 6x UG Deck Case 80+ plus extra storage space