<<<<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