Water! That is... if you consider water a household item...
This is due to its two lone pairs. More info can be found at:
http://en.wikipedia.org/wiki/Molecular_geometry
Of course, one lone pair in a molecule with steric number of 3 works as well. (See VSEPR Model for more info)
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a bottle of soda ( 16 ounces)
Nothing because a millimeter is a unit of length not weight.
Probably no individual item. But the combined length of all the fibres in carpets, or all the yarn in clothes, all the strands of wires in cables would measure kilometres.
A speck of dust is about as long as 1 millimeter; a speck of dust can be found in all houses.