This reminds me of the old Pepsodent commercials where someone would sing "If you brush your teeth with Pepsodent, you'll wonder where the yellow went!". First, who's teeth get so yellow that they wonder what happened? And second, that stuff was ABRASIVE! My parents always bought the powder since my father didn't like that 'new fangled stuff in a tube' (too much waste!). I swear it took a thin layer of enamel off every time you brushed your teeth!
Change the word on the leather case to "PHNAPPSTING" and move the words "Tooth Powder to the leather case just below the first word and make them white, maintain all aspects of the picture and style