Here’s a pic of the coupon in question.
Where I believe the natural reading of this coupon would lead one to believe it could be used on any Dreft product, including the 3 mentioned, it ACTUALLY means that you can ONLY use it on the 3 products listed. Something you only find out when you try to use the coupon on the stain remover and it beeps.
Here is what they had to say about it on their FB page.
It can only be used on products where the first 5 numbers of the UPC code is 37000 and using it on anything else will cause it to beep at the register. Sorry about the confusion and Happy Couponing!