Colgate's Ribbon Dental Cream, from 1912, came out of the tube in a flat ribbon. Sounds like a great idea though I bet Colgate realized people would use more if the toothpaste came out of the tube the way we're used to it today:
Ipana toothpaste from 1939:
Colgate Ribbon Dental Cream from 1955. According to Interfaces, Gardol, or sodium lauroyl sarcosinate, is still used in toothpastes today:
Colgate Dental Cream from 1960. I had no idea toothpaste once came in a can like shaving cream:
All of these toothpaste tubes would have been made of metal, not plastic.
If you're a nerd like me and think a quick history of toothpaste and tooth powders would be an interesting read, click here.