change cap of potion backpack

[penivaldo]

look, this is a part of my NPC script:

-------------------------------------------------- POTIONS ----------------------------------------------------

cargas = 50

bp_mp = 2001

-- Mana Potions
mp = 7620	

-- Mana Potion
	elseif msgcontains(msg, "mp") then
	selfSay("Esta certo da compra de 1bp de {mana potions} ao custo de {5 unamed coins}?",cid)
	talkState[talkUser] = 2
	elseif msgcontains(msg, "yes") and talkState[talkUser] == 2 then
	if getPlayerItemCount(cid,uc) >= 5 and getPlayerFreeCap(cid) >= 1818 then
	doPlayerRemoveItem(cid,uc,5)
	local bpmp = doPlayerAddItem(cid,bp_mp,cargas)
	for i=1,20 do
	doAddContainerItem(bpmp,mp,cargas)
	
			end

I wanna make my npc sell backpack with low cap without change the potions in items.xml.
maybe a backpack of potions with 20.0oz

can somebody help me?
rep ++

 

[Cykotitan]

no can do