Your post is confusing. You say you are doing a rebranding campaign......Wouldn't that be Capri Suns job? Morover, you say "how would it (Capri Sun) fit into the Adult Beverage market?
I assume, by saying entering into the Adult Market, that you will be mixing alcohol with your product, am I correct? If this is the case look to wine companies for more information. There are compoanies that have adult beverages packaged in Capri Sun type pouches that mix wine with their concoctions. Also Think "Mikes Hard Lemonade" Brands. They have done an excellant job of making an impact on the adult market with "soft alcohol drinks"
Whether you think can or think you can\'t, you\'re probably right!