I have to pump now that I'm back at work and baby is staying with daddy. Once a bottle has been defrosted I KNOW that I can't refreeze it but if it's been heated for 10 seconds and given to baby but she doesn't eat the whole bottle, can we put it in the refrigerator and give it to her at her next feeding 3 hours later? Or later that day? Can I reheat it again for 10 seconds at her next feeding??