A few years ago I bought a bag of salted peanuts, Sainsbury's own brand. On the pack it said "Warning: may contain nuts."
A couple of years ago I was looking for a birthday card for a bambino's first birthday. Found a card with a big pin-on badge that said in big colourful letters "I am one!" On the back of the badge was a little sticker that said "Warning: unsuitable for children under 36 months due to small parts."
Today I bought some citronella incense sticks (I use 'em in the garden to deter biting bugs in tbe evening). The pack declared "Bring your garden to life!" On the label in small print it said "For indoor use only..."