The short answer is no. Manufacturer coupons can be thought of as a contract. As a consumer, you are responsible for honoring the contract that you and the manufacturer listed together on the coupon.
Now look at the coupon. The coupon says buy 1 get 1 free, which means it lists two items, one that you buy and one that you get for free. The small print says “Limit 1 coupon per purchase of the stated quantity.” This means that only one coupon can be combined with the freebie coupon. Of course, there are exceptions to this rule.
Here are the exceptions:
You have store coupons for Pantene or store coupons for shampoo that can be stacked.
You have store coupons for the same item, but not manufacturer coupons.
These free coupons are great store coupons or store free sales.
Remember to always check your store policies and their coupon policies.