The replacement was the Ceramic Glaze Long Lasting Shine Nail Lacquer in the shade 'Pure' which seems like a nice opaque white. I actually don't have a white among my excessive nail polish collection I'm satisfied with this replacement :) It seems like it'd be great with the new OPI Sheer Tints that I got.
The $10 Mystery Add-on was the Stila Stay All Day Waterproof Liquid Eye Liner in 'Intense Black'. Woohoo! I've been meaning try this but was always hesitant because of the price and hearing that it dries out quickly. It regularly costs $26 at Sephora/Shoppers so I'm able to try this for less than half the price.
I paid $24.86 for this box and the value (excluding nail polish) was $53.11 so this was another hit for me. Topbox was a great value this time and it makes me excited for the next box.