@EventHandler
    public void on(PlayerItemConsumeEvent event) {

        ItemStack itemStack = event.getItem();
        if(itemStack.getType().equals(Material.POTION)) {
            PotionType type = Potion.fromItemStack(itemStack).getType();
            if(type.equals(PotionType.STRENGTH)) {
                event.setCancelled(true);
                event.getPlayer().sendMessage("§4Du darfst in §1Salvos§c keine Stärketränke verwenden!!!");
            }
        }
    }