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.
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With brilliant minds like Cisco and Harry, The Flash Season 4 is the time to put some bling-bling on our speedsters.
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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.
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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!