I'll start the list: Others can chime in to finish the list.
1. Dad's
2. Coca Cola
3. Orange Crush
4. Hires
5. Nesbitt's
6. Birely's
7. Canada Dry (2 versions...one with crown de-bossed, other without crown de-bossed).
8. Pepsi (2 versions...single dot, double dot).
9. Barq's
10. 7-Up
11. Royal Crown
12. Squirt
I just had someone offer me a Tru Aid embossed 55 which is talked about, but not pictured, in the 3 edition of the classic soda machines 3rd edition book. So, add another one to the list as rare as the dad's.