Problem/Bug Problem with Cooldowns

I'm currently having problems with my cooldowns. What is happening is that I use the sugar and it says you cannot use it if I try using it again, which is normal. But after 10 seconds it still says I can't use it. I can't figure out the problem but my code is shown below, if you know the problem please help ^.^ .

Code:

package me.mrwaffleman;

import java.util.ArrayList;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.plugin.Plugin;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;

public class Sugar implements Listener {
    ArrayList<String> cooldown = new ArrayList<String>();
    @EventHandler
    public void onPlayerInteract(PlayerInteractEvent e) {
        Player p = e.getPlayer();
        if(!(e.getAction() == Action.RIGHT_CLICK_AIR || e.getAction() == Action.RIGHT_CLICK_BLOCK)) return;
        if(!(p.getItemInHand().getType() == Material.SUGAR)) return;
        if(cooldown.contains(p.getName())) {
            p.sendMessage(ChatColor.RED + "You cannot use this yet!");
            return;
        }
        ItemStack is = p.getItemInHand();
        if(is.getAmount() > 1)
            is.setAmount(is.getAmount() - 1);
        else p.setItemInHand(null);
        p.addPotionEffect(new PotionEffect(PotionEffectType.CONFUSION, 200, 0));
        p.addPotionEffect(new PotionEffect(PotionEffectType.SPEED, 200, 1));
        cooldown.add(p.getName());
        Bukkit.getServer().getScheduler().scheduleSyncDelayedTask((Plugin) this, new Runnable() {
            public void run() {
                cooldown.remove(p.getName());
            }
        }, 200);
    }
}

EDIT: I even tried if(!(cooldown.contains(p.getName())) {
My code here
}

But it still didn't work :/