Recommendations for travel potty seat?

Life is Exciting

hi. I was wondering if any of you have found a good fold-up potty seat to carry in the diaper bag on a daily basis? I'm looking for one to put on top of public toilet seats so my little guy's bum doesn't fall in and preferably one that has handled he can hold onto so he's not gripping the inside edge of a dirty public toilet while he holds on to the potty to push.