This is one of those interesting little tricks and no, I haven't tried it.
So, has anyone tried this yet?
It was funny last night. My son was here before footie practice and got himself a bottle of water. When he finished I told him about the egg trick and got the comment .. and am I supposed to commit that to memory Mum! LOL!
I now have a plastic water bottle and will try this this weekend! Good to read it works!