Good day, 
I hope you all are well. I am very new to mould making and am having a challenge. I want to make a silicone mould of a vase that is not straight up and down, it has curves and is hollow inside. I have done some research and seen how someone made a mould of a solid ball in two parts. I have been trying to wrap my head around how I would get this done for a vase with a hollow section bue have not come up with anything that looks practical. I a seeking your guidance, thanks in advance. I have attached two vases I am attempting to make a silicone mould from.