Two summers ago, I traveled to Las Vegas in July for a Convention. I went by myself and took my infant son (2.5 months old at the time) with me. At the time, I was nursing and addicted to Caffiene Free Coke (regular, not diet), and I knew I would probably NEVER find that within walking distance of my hotel, let alone have free time to go searching for it.
I put six 20oz bottles in a large zip loc bag in my suitcase and it arrived with no problem. I would probably not take cans, but the 20 oz. bottles or 2 litres should be ok. I would seal them in a plastic bag, just in case, and pack soft items around them.