These are individual, single potion bottle dice, not a set. These are all liquid core, there is a separate listing for solid core dice. 

Choose the one you want from the drop down menu. If there is an issue with the dice it will be marked (discounted) and there will be a description of the problem below. 

You can request to have the cork painted as well as having the numbers painted gold or white by leaving a note. There is no charge for this service. 

Oil and water d6 has an ink stain inside. It will not effect the roll.
Oil and water d20 is just not as clean as I like. It will not effect the roll.

Some of the pink ones have a small air bubble, this will not effect the roll.

Individual liquid core potion bottle dice