I rarely bothered with DS2. I didn't like to be away from him when small then he got older and was ok with water and solids if I had to go out.
I expressed sometimes for DS1 then he wouldn't drink it! I went to Big Day Out when he was 10 months and was gone for many hours, my boobs were killing me and he wouldn't wake up! He had barely touched the EBM I'd left, had been happy to eat his dinner and be rocked to sleep