The Lengths Some People Are Willing To Go To Prevent Others Using Their Cup...

[6Foot2]

http://www.geekfill.com/wp-content/uploads/2011/08/lockcup.jpg

[jedmondson]

I need some of these.

[Linux_Nut]

i'd be the smeg that would try and bodge something so i could use it.

[featured_spectre]

Gaffer tape would be your friend here, both inside and out

[plexer]

and all over your hand, the floor......

 

Ben

[glensc]

Excellent, I'd put a hose in the hole and a bite valve in the other end, then stand it on a shelf above me.

Having to stop typing to drink is so 20th Century