You pyrex tips users are lucky. I got 2 of them and even after sending both back for replacements, they don't fit good...at all. My clear pyrex just does not have enough glass beneath the o-ring to really fit "into" an aty/carto. My blue cobalt one is not much better. I had to repalce both o-rings with #47's because what came on them was too big.
So, for $30, I have 2 pyrex tips I don't want to use outside of the house. I've lost one of them 3 times in the house and finally found it. All I have to do is look at it wrong and it will fall out. My cheap delrins work 100% better.
But...you are right, I am able to see the condensation on the clear one and can see the vapor that stays inside if you don't dry hit it.