Gosh, our preschool doesn't have any rules like that, but then there are no children attending with a nut allergy either. They have tried implementing the 'no processed food' rule, but parents ignored it and when I asked about this once, the Director said that if they took the food out the lunchboxes that was processed, some kids wouldnt have anything left to eat. I do put a wee drop of cordial in Erin's drinkbottle, but she doesn't have juice at all with her lunch, so that's why I give i too her.