It's a pickle jar. Whether for peppers, capers, cucumbers or anything else that can be pickled, I can't speculate. Handblown, most likely dating around 1890 or so.
Nice clean find! And the little bit of ribbing on the shoulders and the uncommon color give it that extra pop! I agree with the age guess approx 1890- 1910. The size makes me lean towards capers or small pepper corn -or possibly pickle or pepper relish.
Thanks for posting!
~Fred