What IDIOT would choose paying a whole ?1 for a 2Kg sack of ready-made ice cubes instead of filtering their own water through a Brita jug, carefully pouring it into 30 ice cube trays, carefully carrying them to the freezer, trying to stack them all up without spilling the water, mopping up the spilled water on the floor and in the freezer anyway, waiting for them to freeze, squeezing them all out into a bag as your thumbs go blue - and remembering to get it all done 'in advance' of your friends dropping by en masse instead of remembering the instant they arrive that 'sorry I don't have enough ice'?