The Divine Surgeon - Vol. 2 Ch. 130

[MangaDex]

 

[derpdederp]

Wonder what they used as a tube

 

[Goldenzeal]

Wonder what they used as a tube

People used to make water containers out of bladders, intestines and stomachs.
So most likely they used the smaller intestines from some smaller animals.
A pig intestines would probably be to large.

 

[R4nd0mGuy]

What the significance of "matching blood" that she blush in this context? She was already feeling touched, but react more when mentioned.