on my last hike I used one of those refillable tubes and it work out fine for me. I filled it with my favorit organic peanut butter and I used it every day <5 days>. when I go out again I'm going to mix it with raw organic honey and not worry about jelly. In the past I used the skippy squeeze tubes but they disapeared from the stores.
Got my tubes at Uncle Johnny's in Tenn. while hiking the AT. I have also seen them in the REI store and campmore sells them too.