Although juicing doesn’t take as long as many assume, I often do large batches on Sunday night to last me for a couple of days. I freeze my juices in 16 ounce Ball mason jars.
Then I pack the frozen juices into my cooler bag, throw in some blue cooler packs, bring them to work, and drink my juices as they thaw.
You can also get a stainless steel thermos. Throw it overnight in the freezer. Then throw your fresh-pressed juice into it. It keeps the juices cold all day long.