I used to believe that the date stamped on soda cans and other beverages saying "For best taste, drink by..." meant that the beverage would taste the best on that exact date. I tried saving a can of Coke for about 2 years so that I could savor the "best taste." I thought this applied to milk as well, and learned the hard way that it didn't.
A childhood belief about drinks

others believed things like this
- I believed butterflies taste like butterAnon
- I used to think that adults drank coffee because the bad taste would wake them up.Anon
- I used to believe that vanilla flavoring would taste as great as it smelled!!
Judy— judy - When I was a child, I used to believe that adding sugar would lower the over-salty taste of a meal.— Francois
- I Used To Believe The Monster Beverage/Energy Drink Was Monster Milk!— KellGirl
- I used to think that you had to be french to really taste french fries.— Not French;)