So I haven’t used phero’s for a few months, (I have about 20 togo bottles) and 5 Big bottles. Needless to say, most of my togo bottles evaporated when all of them were over 50% filled.
So use them while you can guys 
Evaporated? What did you do to them? Leave the caps off? Did you unscrew them? 
I have togo’s & bottles that are over a year old, a few that are pushing 2… None of them have evaporated
I had a leaky to-go which evaporated. Bone dry. But my other to-go of TUTH was fine after 8 months.
Edit: storing to-gos upright may make a difference.
Evaporated means they were not well capped at all… none of mine have ever evaporated. I have some from over a year ago.
hmm interesting, HI new old guy
My Instant Female Magic togo evaporated. And here I was saving it because I could not order anymore! I did have the bottle stored on it’s side in a drawer..
Make sure they’re screwed on tight and the plastic cap is clicked on well.