<<<<Sorry, I can't help with the 1/2 teaspoon.>>>> Standard teaspoon as issued by chemists here with medicine is 5 millilitres or 5cc, whichever you fancy. Most teaspoons approximate to this. Sid P. _________________________________________________________________ Sid Pullinger Email : [log in to unmask] 36, Grange Rd Compuserve: [log in to unmask] Alresford Hants SO24 9HF England