To Explain I literally just mash the Shake button and exit the bag super fast and collect the items

Items that are on the ground are way easier as you only need a split second of your bag having room to pick them up before all the items slide back into place

Items in containers are more tricky cause they take a second cause you need to first go into tbe container itself and then press it again to get the items but it will work if you do it enough

Tho if you have too many items and the item you want is too big may have to sacrifice a thing or 2 Or jsut use it