Hi I was just wondering if this is okay my 10 month old has had his morning bottle 9ounce but hasn't drank it all today there's just over 3ounce left would it be okay to transfer the rest into his sippy cup to drink with his breakfast I just don't know because his bottles get sterilised but his sippy cup doesn't so I don't know if this is going to cause germs I'm not sure would it be okay for him to drink instead of waste?