This deep silverware organizer let me stack 3 times more than a generic one while still fitting in a drawer. The finished product is 3" [76 mm] deep, 10 1/32" [255 mm] tall, and 7 7/16" [189 mm] wide. Each opening has a slight chamfer to help with loading.

Print in whatever material with whatever infill. This doesn't see much stress. The base is simply 1/8" [3mm] plywood cut to the above dimensions.