The rim around the urinal is great because it reduces the sharp edges of the other ...
Update, The rim around the urinal is great because it reduces the sharp edges of the other urinals and provided added comfort.  The long tub, conveniently removes the urine from the bed and easy to access to eliminate.  My husband was very sick in the end and unable to move freely.  His lack of movement reduced the ability to utilize this urinal effectively.Even with that this was his preferred urinal.
Rating: 5 stars