Thaw is a brilliant and romantic tea light powered light from Mathmos.
Place the water filled silicone mould in your freezer for about 8 hours (Put it in, in the morning ready for an evening meal is what we do!)
The ice 'shade' then sits above the mould and the stainless steel collar and is illumiated by the candle. As the ice thaws the water melts back into the mould taking about the same time as the life of the candle to thaw (3-4 hours).
Every time you use Thaw the shape of the ice, the way it melts and the way it holds the light of the candle will be different.