So with some consumables like Thunder Special laying around during these invasions, its kind of annoying that you can only carry one at a time, but, i found a way that you can guarantee that you'll have more than one available as long as you're near a mailbox.. So whats the trick? Its this simple : Keep one in your inventory and shift+click the loot that would usually cause it to go directly into your bag, instead, itll just open up the "item looting" process and nothing will happen. Just close the looting bag or whatever then check your mail. Rinse and repeat. I Have NOT tried with other items yet.