I made a 3" square of 1" thick hard plastic foam and made a hole in the center for the bottle, and I save old bottles without the safety caps.  I transfer about 1/4" of cement from the new bottle to the old bottle, and refill the 1/4" when I use it up.  This prevents most bottles from getting tipped over, and also limits the spill if I get really 'thumbsy' and knock the bottle around or over.

Todd Sullivan
Liverpool, NY