Caribou Coffee: BOGO Cold Drinks Tue & Thu in JulyJuly 5, 2016 by Mitchell Wischmann This post may contain a link to an affiliate. See my disclosure policy for more information. Calling all coffee fans! Every Tuesday and Thursday in July, stop by Caribou Coffee and get BOGO cold drinks after 2pm. Just mention this offer to the cashier; you don’t need to show a coupon.