1 looks like something I may randomly come across while exploring a mountain or cave, it looks like a rock and i'm just smashing it open. 2 looks very relic like, maybe it contains ancient Oort materials, nothing too special though because it looks common even though its a relic. 3 is a... thing, maybe I broke a tree and found something curious inside. 4 looks like something I would walk inside, a good place to hang up some tools. 5 looks like 4 except its either really small by comparison, because it opens from the top or it's launching a missile. 6 looks like a convenient average storage container. 7 is where my robot suit lives.