Worrying a litte about this - DS (2) and I were at the stables this morning. The lady who runs it had her grandchildren there and offered him some apple juice at the same time as her girls. I fetched a sippy cup from the kitchen cupboard for him to drink it out of, looked clean enough at a cursory glance inside. Once he'd drunk all of the juice I went to rinse it out and noticed that the inside of the spout (made of rubbery stuff - not a Tommy Tippee type) was covered in that horrible black mould stuff, the type you get in bath toys. Sure he will have ingested some. As a one-off, do I need to do anything about this / anything to look out for? He's a very healthy toddler otherwise, so I'm probably stressing about nothing, but just wondered if anyone knew?