http://www.kleinbottle.com
Edit: You can even put in some liquid (the “hose” continues through the crossing). The fun part is getting it out again :)
Glad he is not famous only for that book. As fine as it is.
http://www.kleinbottle.com
Edit: You can even put in some liquid (the “hose” continues through the crossing). The fun part is getting it out again :)