Expressed breast milk advise please

[XxLondonxX]

Hi, unfortunately my little one never took to the breast but I'm doing quite well with expressing so have been giving him my expressed milk by bottle which I'm fine with.
I'm just wondering whether anyone else did the same. How did you go about taking ebm out with you for days out etc? How do you avoid taking too much with you and wasting it? Any tips would be amazing!

I expressed for 9 months, and would often take the pump with me on days out to be able to give fresh milk. However on long days I would also take the ready made bottles of formula just in case of any issues. Most of the time I didn't need it but I always felt more relaxed knowing I had an option.