While the plain silver can is a little dull, the logo is very effective in portraying what the product is and the flavor of said product. The logo gives the can just enough flare.though it could be jazzed up a little bit more.
Similar to 'Monster' can, this utilises a contrast of a bold colour on a black background. Could try this, maybe white silhouette, or large logo like this existing product.
Rutt Beer Brewery - The complexity of the animal illustrations is complemented well by the playful typography and simple colour palettes, which hold the designs together. All of these elements together make me think they'd appeal to a mass audience.