Version 3.0 is printing now. Hopefully this one will fit nice and snug with no movement BUT allow the lid to close. That is going to be the biggest challenge. Making them functional and deep enough for daily cup use but allow for the lid to close. I'm not even sure it will be possible. I can't compromise on function so I may have to give up on the idea of closing the lid. If I go that route then it opens up a lot more possibilities for adding function to this cup holder like a cell phone slot, 12 volt plug, etc.