With the new danger rooms, and the seeming trend towards optional super hard stuff with higher rewards if you do well, I'd like to propose a new, 3rd, type of treasure box. Essentially, they would operate similarly to the red boxes, in that they would not contain potions (or vitapods?), and with double, maybe increased to triple, as red are already double (i think) heat and crowns. The main difference would be that a tier three box would always contain an item, either a material or a gear drop, and never contain a one star item (so no shards).

Primarily, this would allow tier three boxes to be placed in small numbers, thinking in the one to two range, in places like danger rooms, 3rd room of battle arenas, or the core. This way the green boxes can hold their current function, the reds can continue to be rarely dotted around levels, and make up the bulk of the boxes in the core, danger rooms, or whatever else shows up, as well as the occasional red in vaults, or randomly in a level as a nice surprise, and the tier three boxes can be specific location only, allowing people to feel secure that they are getting *something* for their risk as a payoff at the end.

Also, something makes me want to suggest purple as a tier 3 box color.