Single water bottle organizer fits in cabinets and refrigerators. When using two shelves, they can be stacked on the countertop with screws and nuts to save desktop space. Set of 2 water bottle organizers for cabinets, one tier holds 5-6 small water bottles. There are 4 tiers of shelves in total, which can hold 20-24 water bottles in total. The overall dimensions of the water bottle organizer are 16.4 x 9 x 8.6 inches. The height of each tier is 4.13 inches. The total height is 17.5 inches when two tiers are stacked. The single tier holds approximately 8 pounds.