The McDonald's Shamrock Shake has a cult following. Why not use that minty fresh power for good?

Enter: Skreened. The local T-shirt company has partnered with the Ronald McDonald House Charities of Central Ohio-in celebration of the charity's 30th anniversary-and designed this shirt featuring the Shamrock Shake mascot, Uncle O'Grimacey.

Starting today, thirty percent of the cost of each shirt will benefit the RMHC of Central Ohio and McDonald's will match net proceeds of the shirts up to $2,000. Prices start at $21 (roughly 10 Shamrock Shakes, but it's for the kids). Pick one up here.

Also, this vintage commercial of Uncle O'Grimacey proves he's the uncle in the family with a drinking problem... did somebody say Shamrock Shake addiction?