I shared a few weeks ago about how you could get (2) free $5 off Huggies coupons on Recycle Bank. I also mentioned that you could instead redeem your points for $1 off Coke coupons.
They've since raised the price of the Coke coupons to 20 points each, but the fantastic news is they're actually good on ANY Coke product, so that includes the single-serve bottles and 2 liters.
Simply registering with Recycle Bank will garner you enough points to
request five of these coupons (note they've change the price of the coupons to 50 points each), so you could potentially get 5 FREE Coke 2 liters with a sale! Look for the coupons under Grocery & Food in the Beverage section.