Try this, fast made script. Maybe wont work, but give it a try.
local itemid = ????
function onDeath(cid, corpse, lastHitKiller, mostDamageKiller)
if getPlayerSlotItem(cid, 2) == config.itemid then
doPlayerSetLossPercent(cid, PLAYERLOSS_CONTAINERS, 0)
doPlayerSetLossPercent(cid...