is the Carex Male Urinal, Snap on Lid, 32 fl oz. Capacity, Transparent Plastic with Graduated Measurements STERILE when new? does it come factory sealed or do i have to wash it before use? are they dish washer safe?

We recommend always sterilizing it before using. It is dishwasher safe. Thanks for asking!

What is your recommendation for cleaning and/or sterilizing the urinal?

Great question! We recommend using hot water with dish soap to clean your urinal. A scrub brush with a long handle (one designed for cleaning dishes or even toilets) works great for getting it clean on the inside. Using bleach with water works great as well. Hope this helps!

Must know the ID "Inside Dimensions/Interior Dimension" of opening. NOT the width of the lid.

The inside dimension of the urinal is 3.5" in diameter.