Right now there is an insanely good printable coupon that is $3.00/1 Persil Laundry Detergent (limit 2). It has no limitations so you can use it on any size! Below is the deal scenario
Buy Persil Laundry Detergent, 10 oz for $1.99
Final Price: FREE!!! 
Target doesn’t pay overage so it will tell the cashier it isn’t valid, and then they will adjust it so that it is free. There is also another bonus! On the bottle there is a $2.00/1 Persil Laundry Detergent Peelie that you can use on another order! So you’re kind of being paid coupons to buy these!