Wow, I'm really surprised you were able to drink the 60. Did you spill a lot trying to find the drinking sweet spot? I'm sure you'll have trouble with the 90 too so next time you should just go ahead and move up to the 100. You'll be amazed at how much easier the 100 is to drink.
If knowledge is power, yet we are not so quick to give just anybody power, why then should we be so free with knowledge?