Milk Packaging Designs For Inspiration - We Design Packaging I find this design fun yet professional. I think it might be cool to include little lines that say when to refill or something like the eff (Bottle Packaging)
Beverage Re-Design: Juice Squeeze by Sara Stanger, via Behance - i think this is adorable! so different from the normal juice squeeze packaging. i dont know if that sort of top would work for carbonation though.
Ramm ND, a Russian designer, with a touch of genius, designed these aesthetically pleasing work of art from our normal can drink packaging. Ramm has changed in what is considered an everyday object to something very very special.