A lens mug.

Find a cheap plastic cup the right diameter...superglue it in, but would need somekind of sealant round the rim

I'm going to work off this idea, see where we go. I'm sure someone will work out a 'sealant',
 
Tim,

Do you think you could get the IS to work, so it would cure the shakey hand of the caffeine addict/ alcoholic/ up all night student??

Not only would this save some embarrassment, but would reduce the crime of Spillage!
 
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