$2 Dunkin’ Medium Cold Brew Coffee from 2-6pm

Dunkin’ is offering $2 Medium Cold Brew coffee from 2-6pm local time. No coupon is required. States that it’s for a limited time but no definitive end date posted.
I can’t find the URL for the offer but it shows up as an ad in their mobile app and I see it advertised in-store.
pic of the in-store ad
Dunkin’ Store locator: https://www.dunkindonuts.com/en/locations