Although not a genuine offer i.e. this is the standard price in-store it is still worth noting that many specialist American food importers charge over twice as much for the same product.
Good old Dave at American soda will lift your leg for exactly the same product to the tune of £8.24 delivered!
My local American import shop will charge you £6.95 a tub!
My local Tesco have been doing the Tropical Punch flavour for a while now (and it is always in short supply) and today I noticed that they have introduced a Strawberry flavoured version for the same price £2.99.
One tub can make around 8 quarts, I normally stick a table spoon and a half in a straight glass over Ice and it is delicious and refreshing especially with the current weather.
Go on give it a go.