Just make sure whatever you do, don't buy the 6 ounce deli containers, I did one year because I simply glanced at the size and assumed they were the standard 8oz once, and upon getting home noticed the difference on the package but me figuring "eh, how much of a difference is 2 ounces really? " well let me tell you... A LOT! You can just about keep a frag disc wet in those containers and the coral if it's something very flat like an encrusting monti, but anything else... forget about it!
Go for 16 ounce just to be safe.