A quick hack fixes the over-dispensing problem
I thought I was so great.  Yes, I had read all the reviews saying these tubes dispense far too much sanitizer at once.  But I was going to be careful, not like those *other* Amazon customers who don't know how to work a squeeze bottle.  Well, the bottles arrived, and sure enough, they are so determined to be leak-proof that when you squeeze them, nothing happens until all of a sudden an olive-sized dollop of product comes out in one big "blurp!" Being gentle does not help; the dispensing is all or nothing.  I might try to MacGyver a solution by poking a small hole somewhere to try to fix this problem, but for now these bottles are too annoying to use.  The good: 1) These come in black to be less obvious when dangling from a dark bag, though this camouflage is slightly undermined by the white cap.  2) The carabiner for clipping to a purse/backpack is handy.<br />EDIT: Fixed the all-or-nothing dispensing problem by using scissors to make a tiny slit in one of the "petals" surrounding the tiny opening.  Now a slight squeeze gives the desired small amount of product.
Rating: 3 stars