Android : XMPP read/write each hashmap or bundle of hashmaps?

As title says, Should I send each of my hashmaps over xmpp (gcm / ccm) individusally such as creating a bundle for each hashmap? or should I make 1 bundle and put all my hashmaps into the 1 bundle and then send?

Sorry I'm tired, here's my question in code form:

Question in code form:

Bundle sending= new Bundle();

then

gcm.send(Photex.SENDER_ID + "@gcm.googleapis.com", regId, sending);

or

sending.putSerializable("1", HashMap1);
sending.putSerializable("2", HashMap2);
sending.putSerializable("3", HashMap3);
sending.putSerializable("4", HashMap4);
sending.putSerializable("5", HashMap5);
sending.putSerializable("6", HashMap6);
sending.putSerializable("7", HashMap7);
gcm.send(Photex.SENDER_ID + "@gcm.googleapis.com", regId, sending);