Water, H2O, a simple everyday necessity; formless, clear and a little wet but a drop in temperature and its expansion of 9.6 % puts a different slant on this.

This feat of physics alone can be further enhanced when combined with a touch of retro, as there's no school like the old school you may well find yourself humming that 1980's iconic game theme tune as you fill it with water and place it in the freezer.

The challenge arrises as you try to get the pieces to fit together in your glass before they thaw. If you need more time to work with these you can always use the mould to produce mini cakes, biscuits or add some color with jelly as it is made from 100 % food grade silicone.