I got a few christmas bibs (matalan had some nice ones) bath toys, his favourite snack (rice cakes) milky buttons, bath net for bath toys, socks and I am putting in a banana, apple and a pear as he loves his fruit and £1 coin as we always had a 50p in our and I figured £1 is good until he is older!
How about a rattle, baby spoons, you can get mini size johnsons baby bath stuff in boots too??