from the link:

Hypotonic Drinks

1. 100ml fruit squash

   900ml water
   1/5th teaspoon salt (1g)

2. 250ml fruit juice

   750ml water 
   1/5th teaspoon salt (1g)　

　
Isotonic Drinks

1. 50 - 70g glucose or sugar

   1 litre water or sugar free squash
   1/5th teaspoon salt (1g)
   Dissolve the glucose or sugar and salt in 100ml warm water before 
   adding it to the remaining 900ml cold water or sugar free squash

2. 500ml unsweetened fruit juice

   500ml water
   1/5th teaspoon salt (1g)

3. 150ml High Juice squash

   850ml water
   1/5th teaspoon salt (1g)