I'll surrender my Dr. Pepper when they pry it from my cold dead hands.
The Good Doctor is your friend indeed
On vintage bottles of Dr Pepper, the numbers 10, 2 and 4 appeared as a reference to a study done which showed that workers would crash during: 10:30 am, 2:30 pm and 4:30 pm. Dr Pepper used the study as a marketing tool, to remind people to drink Dr Pepper.
The Modern bottles of Dr Pepper have the Number 23
Dr. Pepper was developed in 1885 in Waco, Texas, by a pharmacist, Charles Alderton. In his spare time, Alderton liked to serve soft drinks at Wade Morrison's soda fountain shop and decided to make a soft drink which tasted as his pharmacy smelled. He kept a journal of different combinations of syrups, and finally, he created a flavor he enjoyed, mixing 23 flavors to create the soda we all know today.
The recipe is a secret however there is speculation that the recipe contains: cola, cherry, licorice, amaretto (almond), vanilla, blackberry, apricot, blackberry, caramel, pepper, anise, sarsaparilla, ginger, molasses, lemon, plum, orange, nutmeg, cardamom, allspice, coriander juniper, birch and prickly ash along with prune juice and possibly tomato according to The 23 Flavors of Dr Pepper and Hayden Bernstein, author of Thrillist.