It's a wonder how The Flash has still not gotten a Flash Ring after three seasons. In the comics, the ring is able to contain Barry's suit so he can whip it out whenever he needs to change.
With brilliant minds like Cisco and Harry, The Flash Season 4 is the time to put some bling-bling on our speedsters.
Heck, Harry even offered Barry to make a ring back in Season 2! He straight up said that he knows a thing or two about micro-technology.
Besides, it's getting a little old that Barry and Wally always have to run to STAR LAbs to get their suits. A ring that can store your suit? There is nothing bad about that!