Pat,
The MegaBass Vios SPs are great if you put no external pressure on the packet or pre rig them, otherwise they become deformed, split or melt. I think for boat lure fisherman they are great, but for us rock hoppers -- waders stuffing gear into chestpacks, bumbags or rucksacks it is a problem, although you could put them in small plastic boxes, but this all takes space and weight.