In central India summers are extremely hot. So in order to stay hydrated we (a.k.a. me and a couple of friends) have been advised to carry with ourselves a refresher (which is basically a flavored ORS solution along with a bunch of vitamins and minerals.)
However what I also tend to do is sometimes put the energy drink solution in the ice tray to make energy ice-cream
Coming to the question I have noticed that this energy-ice is much more harder to get out the tray than normal ice. Why is it so ?
Link to the image: the orange ice is the energy one
As you may notice from the Image that at some places the ice has an orangish tinge (The tray on the right). Although these areas were filled with normal water ice the small amount of energy ice which remained stuck gives rise to the faint orange color seen.