Over time, the cork in the thermos like shrinks, it decreases in diameter and tightly stops clogging his throat. To restore the dimensions of the tube is possible by drilling it from the top blind hole and entering the back benches of thorn — wood truncated cone.
Recommend to read
WINGED FOAM
"It's been fifty years since I work as the head of the aeromodelling circle in syut. Now faced With great difficulties: no aeromodelling materials; if the sets and be available, by type...
AND WITHOUT MILLING…
If Phillips lost the mailbox key, do not worry: replacement can be done yourself. This does not require a milling machine, you only need a strip of metal flat needle files and of course...
