White thin bumper for 4s that doesn't discolor

[clumsythief83]

Hi, does anyone know where I can find a good thin white 4s bumper that stays white? I have bought many white bumpers on eBay and they all become yellowish.

I'm thinking about the UCO skinny bumper. Are they good?

http://www.thehishop.com/case/for-i...e4-iphone4s-cdma-gsm-at-t-sprint-verizon.html

 

[MF878]

Any white bumper I've encountered discolours. That's why a lot of bumpers don't come in white. My partner is trying one of these on her 4S: http://www.bumpnz.com