not a problem once in a while.
Since moving to scotland, DS (2yrs 6mnths) has decided he loves Irn Bru..... well he gets a sip probably 2 or 3 times a week, and thats all it is, a sip!
The girls (4 and 5) dont ask for fizzy drinks, but I know they are partial to lemonade. I just dont buy it.
Every day, numerous times a day - no, deffo not.