I have a Milton water bottle which i didn't use for 1-2 months. Today i just washed the bottle with water and took it with me for office. I poured the water in the cup and drank the whole bottle like that. But later i saw that due to not using it for much time it had white coloured mould growing in the bottle cap and the lid. But i drank it from the cup which had the white mould and i am a little worried now. Is it ok? Please tell.