Michael's/Michaela's Glasses.

I just did 26 straight runs with a friend, no glasses .___.
Also, are the weapon boxes glitched or what? we got the pirate one on all runs and got 2 untradeable dex potions every single time wtp?

Well, the boxes that drop from the three Yetis in the Mushroom Kingdom tend to give out potions at a 99% rate also, so I'm thinking you just got unlucky.