Autosqueeze™ Eye Drop Bottle Aid, 1 Each Thumb Braces Supports Two sided chestpiece with tunable diaphragms Wrist and Hand Two sided chestpiece with tunable diaphragms on both the adult and pediatric sides * Single piece tunable diaphragm is easy to attach and easier to clean because its surface is smooth without crevices * Pediatric side converts to a traditional open bell by replacing the single piece diaphragm with a non chill rim * Next generation tubing provides longer life due to improved resistance to skin oils and alcohol Mixing ratio is one part citrate to nine parts blood when tube is filled appropriately as indicated by fill mark on label Ideal for people with weak or arthritic fingers plastic bottles such as those containing eye drops