public class Interstitial extends Banner implements Parcelable {
...

Interstitial entryAd.setType(Interstitial.TypeInterstitial.APPGAME);
    entryAd.setTitle1("Your internet-100X Faster");
    ...

Intent i = new Intent();
i.putExtra("nombre_extra", objectoParcelable);

Intent i = getIntent();
  ObjectoParcelable objectoParcelable = (ObjectoParcelable) i.getParcelableExtra("nombre_extra");

public class Interstitial implements Serializable {

public class Interstitial implements Parcelable {

Intent intent = new Intent(MainActivity.this, SegundaActivity.class);
                intent.putExtra("listaInterstitial", listaInterstitial);
                startActivity(intent);

ArrayList<listaInterstitial> listaInterstitial = (ArrayList<listaInterstitial> ) getIntent().getSerializableExtra("listaInterstitial");