Creamola Foam reborn

One of the advantages of being dragged on family summer holidays to Scotland in the 1970s was that (if you were good) your mother would buy you and your siblings a tin of Creamola Foam. Now this delicious drinking sherbet is reborn - albeit under a slightly different guise - and I have bought a tin of it to present to my sister next weekend.

Now all I need to reproduce the authentic experience of consuming this delicacy on a deserted (and most likely chilly) west coast Scottish beach is (1) a sticky Tupperware beaker from the bottom of a worn picnic basket, (2) some lukewarm tap water, and (3) a small supply of sand. The sand should be the same variety that accidentally ends up in sandwiches. (Think of it as the precursor to the rim of salt on the grown-up Margarita that you discover when your interest in artificially flavoured sherbet drinks is replaced with one in alcohol.)