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On Sunday, March 3rd from 3:00 p.m. – 7:00 p.m. guests can visit their local Baskin-Robbins for a free sample of a featured Milkshake Mixology flavor combination*. Then, once spring has sprung, guests can Celebrate 31 on Sunday, March 31st with a regular or kids-sized scoop of ice cream for $1.70 or two pre-packaged quarts for $7.99**.