The array of colours of glass that can be found on Scottish beaches is wide and varied. From the generic clear glass of a paste jar through to the cobalt blue of a milk of magnesia bottle it's not until you start looking that you find that beaches are full of colour. Much of the glass found on my local beaches will be between 50 and 100 years old. This is because our coasts have been used as rubbish dumps for a long time and as the sea erodes the coast this rubbish is exposed and deposited on the beach. The broken fragments that are taken by the sea will be washed up onto our shores twice a day.