By A Customer
The vent is a really good idea, but don't use too much lube, or it will seep out. I don't anticipate any problem keeping this one in for many hours. It is a little smaller than I was expecting, but the product description does not mention anything about size. My ideal would have it about 1.5 times as large as it is. Still, I know very well that it is up there, and there's no tendency to force it out. Good idea!