I found this jar of picnic size peanut butter. I also found some paper work with it that said the family traveled to the world’s fair in St Louis Missouri. Other than this I have tried for years to find more information and can not find anything. Please help me with approximate value and possibly if there are any more like it. Thank you!!
According to this, a T inside an inverted triangle logo was used by the Turner Glass Company from 1910-1929. Being a perishable product, it's tempting to think that 318-29 is the packing date (day #318 of 1929, i.e. November 11th). I can't say that for sure though. If it is indeed 1929, that's in remarkable condition for being almost a hundred years old!
The World's Fair was held in St. Louis, MO once, in 1904 (source).
I'm not a collector so I can't speak to the monetary value (as my username suggests, I just dig stuff up in my yard) but I personally would be excited to find something this old in this good condition.