Adds the lingering potions as a bauble to Baubles (Needs capability feature! https://github.com/Xalcon/Baubles/tree/feature/bauble_capability)

PotionBaubles.java

package baubles.common;

import baubles.api.BaubleType;
import baubles.api.IBauble;
import baubles.api.cap.BaubleItem;
import baubles.api.cap.BaublesCapabilities;
import baubles.common.Baubles;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.init.Items;
import net.minecraft.item.ItemStack;
import net.minecraft.potion.PotionEffect;
import net.minecraft.potion.PotionUtils;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.ResourceLocation;
import net.minecraftforge.common.capabilities.Capability;
import net.minecraftforge.common.capabilities.ICapabilityProvider;
import net.minecraftforge.event.AttachCapabilitiesEvent;
import net.minecraftforge.fml.common.Mod;
import net.minecraftforge.fml.common.eventhandler.SubscribeEvent;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;

@Mod.EventBusSubscriber(modid = Baubles.MODID)
public class PotionBaubles
{
	private final static ResourceLocation capabilityResourceLocation = new ResourceLocation(Baubles.MODID, "potion_cap");

	@SubscribeEvent
	public static void potionCapabilityAttach(AttachCapabilitiesEvent<ItemStack> event)
	{
		ItemStack stack = event.getObject();
		if(stack.getItem() != Items.LINGERING_POTION)
			return;

		event.addCapability(capabilityResourceLocation, new ICapabilityProvider() {
			private IBauble bauble = new BaubleItem(BaubleType.CHARM)
			{
				@Override
				public void onWornTick(ItemStack itemstack, EntityLivingBase player)
				{
					if(player.ticksExisted % 20 ==0 )
					{
						for (PotionEffect potioneffect : PotionUtils.getEffectsFromStack(stack))
						{
							if (!potioneffect.getPotion().isInstant())
							{
								player.addPotionEffect(new PotionEffect(new PotionEffect(potioneffect.getPotion(),
										30, potioneffect.getAmplifier(), true, false)));
							}
						}
					}
				}
			};

			@Override
			public boolean hasCapability(@Nonnull Capability<?> capability, @Nullable EnumFacing facing)
			{
				return capability == BaublesCapabilities.CAPABILITY_ITEM_BAUBLE;
			}

			@Nullable
			@Override
			public <T> T getCapability(@Nonnull Capability<T> capability, @Nullable EnumFacing facing)
			{
				return capability == BaublesCapabilities.CAPABILITY_ITEM_BAUBLE
						? BaublesCapabilities.CAPABILITY_ITEM_BAUBLE.cast(bauble)
						: null;
			}
		} );
	}
}