I have been having some really good results using Hydrostone to make my chalices. The silicone is very good quality, easy to remove, and has been holding up well.

For the lid mold, just remember to pop out the inner circle, it is very easy to do. My only critique is that it can be hard to fit the circle spacer properly, I've had issues with it not sitting right but when it does slip it hasn't made a huge difference, thankfully.

I will definitely be ordering more molds in the future!