This is not a bottle but a musical instrument  -  it’s a rackett also known as a ‘sausage bassoon.’  Jim Tribble gave a very informative talk at Edinburgh Castle demonstrating the sort of music that was played at the court of James V about 500 years ago.  Afterwards he was happy to tell us more about the different instruments including a hurdy-gurdy, crumhorn, psaltry and rebec.  Not only was music very important at court and an essential part of the education for the nobility,  he explained how important itinerate musicians were in keeping country people informed about events beyond their communities as well as providing music for festivities using instruments like a 3 holed pipe which could be played with one hand leaving the other free to play a sort of drum, or collect money!
 
This shows some of the instruments that Jim Tribble played.