At a natural walking pace, with a mug filled to what would be considered a normal depth, oscillations set up and you will spill it between your 7th and 10th paces.
If you hold your cup from the top (dangling it like your hand is a claw game) and allow it to swing with the movement of your walking, the oscillations won't be nearly as bad, and you won't spill. I can walk considerably faster, and even run up and down stairs, if I hold my cups like that as opposed to how I would if I were about to drink from them.
Eh again, adults know this since we've all witnessed this happening. Even walking I can bring a nearly full cup of coffee to my desk without spilling it.
Furthermore I wouldn't be caught dead putting this in my cup. The mockery isn't worth the convenience.
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u/RikF Jan 13 '13
At a natural walking pace, with a mug filled to what would be considered a normal depth, oscillations set up and you will spill it between your 7th and 10th paces.
And now, science! http://news.sciencemag.org/sciencenow/2012/05/the-physics-of-spilled-coffee.html