A capped 2-liter plastic bottle containing a clear, colorless liquid is shaken. The liquid turns a deep blue color. At rest, the liquid returns to colorless. The cycle can be repeated many times. Ask ...

From vibrant cobalt blue glass bottles to rare Coca-Cola and unique medical bottles, each find brings history to life. Reggie Jackson announces he’s leaving Astros’ front office: Report Liam ...

"Bristol was the bottle-making plant for the whole world." Mr Adlington explained that adding cobalt produces the specific Bristol green colour which has a tint of blue. The glass is blown by hand ...