Mom VS. Sippy Cup

Loren
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My daughter, Gemma, will be 2 in March.  March 10th to be exact, and she's still drinking from a flippin' bottle.  I am aware that it's my fault.  I take full responsibility (ok, partial only because I'm not ready to fully admit that I  created this bottle-crazed monster).  
It began when she first started taking a bottle.  Of course this came after multiple days of trying to remove nipple ever so gently and replace it with an awkward, cold, silicone tip instead.  Gemma was no fool.  Sleep deprived and rather looney, I sought out help from a fellow Trotter whose daughter had also been picky about her drinking companion.  I was able to borrow SIX different brand bottles from Helpy McHelperson (well, Clara really I suppose) and this didn't include the other 4 brands I had stacked up at home from baby showers/sprinkles/first born.  We tried them all--glass bottles, Dr Browns bottles, $15 bottles, nothing.  Advice from friends, family, strangers alike was that eventually she would be hungry enough and would take the bottle.  Gemma reinvented the word stubborn that week.
In the end, after several WEEKS of introducing bottle after bottle, what did she end up choosing?  Latex nipples (which had actually been included in the insanity pack that we borrowed from Clara, but I had forgotten about them).  You know the great thing about latex nipples?  They are discontinued.  Yes, completely and totally discontinued.  What does this mean?  It means that the latex-hoarding individuals on amazon could sell them to us needy AF parents for WAY more than their actual monetary value.  This 'lucky' couple scored a 3-pack of latex nipples for a measly $33.  Be jealous.  BOOM.  Yep, my daughter preferred $11 nipples that we knew would eventually deteriorate over time--as latex naturally does.
There was even in incident where we traveled out to California, and one of the nipples began to show signs of wear and tare.  I didn't realize it would happen as quickly as it did (thinking perhaps Gemma was an alien after all and had strange levels of acidity in her saliva) and so I was an unprepared mother and the only other latex nipples that existed in the world were in ATX.  What did this mean?  We needed our dear old friends to OVERNIGHT a latex nipple to California.  It does not get much more ridiculous than that.  Really.  I shake my head and laugh as I type this.  And this was our SECOND child, people.
Any woo, time went by, latex withered and silicone became our new bestie.  Lucky for us, solid foods were being given and fluids were being had in other ways than through a rapido nip.  We were able to continuously give her a silicone nipple, and eventually she took to it (phew)!
So now it's present day.  We had collected the insanity pack of sippy cups, and I'm reliving the glory days of introducing a bottle all over again.  Straws, hard spouts, soft spouts, training cups, etc.  Our daughter is SO stubborn that she actually made it 48 hours without taking a single sip from a cup.  Back to the bottle (and wet diapers) she went.  
So if any of you have some glorious tip as to how to get your stubborn (for lack of a better word) child to do something they really don't want to do, let me know.   As for now, it's off to the google machine to search for $33 sippy cup with a latex top---or at least for a kind of cup that's being discontinued.