McDonald’s is celebrating Grimace’s birthday Monday with a new birthday meal.

You can grab a Grimace Birthday Meal, with a choice of Big Mac or 10-piece Chicken McNugget and fries, as well as a new limited-edition purple shake.

The shake, which McDonald’s says is “inspired by Grimace’s iconic color and sweetness,” has taken social media by storm. It appears to be vanilla shake with a berry flavoring.

Opinions on the new shake have ranged from the taste of the shake to having to purchase the meal and everything in between.

Check out some of the reaction:

Mark Heim is a reporter for The Alabama Media Group. Follow him on Twitter @Mark_Heim. He can be heard on “The Opening Kickoff” on WNSP-FM 105.5 FM in Mobile or on the free Sound of Mobile App from 6 to 9 a.m. daily.