WalMart sells the 40 oz containers of Persil ProClean Liquid Laundry Detergent for $5.24. Use the $2.00/1 Persil® Laundry Detergent (excludes trial size) for a nice little deal on this brand. 

Buy (1) Persil ProClean Laundry Detergent, 40 oz @ $5.24
– Use (1) $2.00/1 Persil® Laundry Detergent (excludes trial size) 
Final Price: $3.24!