New York(CNN)After surviving a fear-filled year of the Covid-19 pandemic, getting vaccinated is a cause for celebration. As Covid-19 vaccines become more readily available, companies want to reward Americans who've been vaccinated with special offers after getting their shots. CNN Business put together a list of companies that are providing freebies when you show proof of vaccination. Budweiser Now through May 16, or while supplies last, Budweiser is giving a free beer to anyone 21 years old and up -- who provide their proof of vaccination on ABeerOnBud.com. Bud fans first have to first register at the company's mycooler.com website....