$1.50 cheaper than the previous deal.
If you don't have prime you should be able to get free delivery with subscribe & save (you may need to have an active subscription to get the option to show, reactivate an inactive subscription if need be) or purchase 2.
Regular coke is still $21.47 and hasn't dropped in price.
How to get free subscribe & save delivery without prime?
Edit: It no longer works for first delivery, if you haven't used subscribe & save before you likely won't see the change date button and will need to pay delivery for your first sub & save order, or order 2 (free delivery over $39) and have free delivery in the future. If you have used it before but you don't see option 1, you may need to reactivate a cancelled/inactive subscription here and try again. Banner now states first delivery may incur a fee.