Well, some eyes have opened!

Tuxedo - both eyes open, hes the largest one in the group too!
Calico & Tabby - both have one of their eyes open.
Black - both eyes opened last night, I feel like he has an infection though, my aunt was wiping his face with a moist towel and a bunch of puss or gunk came out all of a sudden, after we cleaned it up he wasn't looking too bad and my aunt is going to take him to a vet if it seems to get worse. Hes the only cat that appears to have any problem right now though.

All the cats have gotten really good at using the bottle, and are getting better at trying to walk around. I'll watch them again later this week and try to get some pictures of them with their little eyes open!