funny you should mention this. I just bought a 2pack of the lily bulbs 2 days ago. When choosing the bulbs, I went through the rack looking at the "solidness" of the bulbs. Many looked "dried out" and dimpled throughout. I chose the most solid ones. Now, that's not to say that these will sprout.... you never know.
When I dropped them into the tank, one sank and one didn't. It's still floating on top of the water.
We'll see. They weren't that expensive anyway..but looked kinda neat on the package..