This comfortable silicone retainer can be worn all day, all night, and even for trips to the bathroom!  Just make sure to line up your urethra with the urine passage. 
 
Retainers keep the skin in a pulled-forward position while you are taking a break from restoring.  This is thought to help prevent perceived loss of any "gains" made during the break.  Keeping the glans covered also encourages dekeratinization, eventually resulting in a smoother glans.
 
Note: Exposure to urine over prolonged periods may cause skin irritation.