“Bottle” seems to be a diminutive of “butt”, a cask for wine or ale.
- 01.058 By the time he had got all the bottles
- 01.063 each with a bottle on the top,
- 01.064 Smash the bottles and burn the corks!
- 09.063 and a leather bottle of wine
- 09.063 but the bottle helped him to do that,
“bottle, n.2.” OED Online. Oxford University Press, March 2016. Web. 25 March 2016.
words that you were saying 
[…] Blunt the knives and bend the forks! That’s what Bilbo Baggins hates– Smash the bottles and burn the […]
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