What penis ring feels the best for the both of us?

Relevant topic analysis on Vibrating penis ring:

Is there any danger of a penis pump cracking?
I feel like if they're made out of glass it could crack and cut me.

Which massage kit do you like?
I really want to try this kit, and I was thinking it'd be a great valentines day present, but I just don't know if it's REALLY worth the money. If...

Silicone vs. Metal
So, my husband and I have a silicone cock ring that we use almost every session. He loves that it helps him last longer. But now that he's comfortable

JeJoue Mio, any one used one yet?
I saw that there was one review out for the Mio, but I don't tend to want to pull the trigger on a product unless there has been a handful of reviews,

white cock or black cock?
Which one is better?