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xkcd #3240: Bottle
(imgs.xkcd.com)
Title text:
"I know it seems impossible, but the trick is that I sailed in here when I was very young."
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3240/
It’s a nice touch that the bottleship’s sail is sagging due to not getting any wind.
Plus the lower waterline from the weight of the bottle.