Shamrock Farms, a Phoenix-based, family-owned dairy company, said it is celebrating 100 years of delivering handcrafted farm-fresh milk and dairy to families locally in Arizona and nationwide. To say thank you, today the brand announced a design contest with “Roxie the spokes-cow,” as well as a commitment to donating 100,000 servings of milk throughout the year to local food banks.

"One hundred years of fueling families is an achievement worth celebrating, and we wanted to mark the occasion by giving back to the communities we serve and inviting everyone to join in on the fun," said Ann Ocaña, chief marketing officer for Shamrock Farms. "We're looking forward to seeing what fun and unexpected designs everyone comes up with."

Shamrock Farms said it is inviting kids and kids at heart to design beloved spokes-cow Roxie's "Birthday Best" for a chance to have their design featured on an upcoming Shamrock Farms milk carton and receive a $10,000 cash prize. Contestants may head to Shamrock Farms' Instagram and Twitter pages to download the Roxie outline and get designing. Entries may be submitted via Instagram or Twitter by following and tagging Shamrock Farms and using #RoxiesBDayDesignContest now through May 20. Winners will be announced in late May.