Those will work. Just will need to add dirt to fill them up enough.
Meph:
My versi is my friendliest T. Don't worry about him coming out. Here's my guy who snatched a roach and hung onto my tongs like a monkey. Then of course i had to sneeze RIGHT then so he fell and i caught him in my hand. Then he trotted back up onto the tongs again for this photo op lol
So yes. He will come out when you try and feed or water or open his cup for anything. But, if he's anything like my versi he's probably wicked friendly and chill haha