Portland based Growlerwerks has developed the uKeg, a pressurized growler that should eliminate one of life’s disappointments, flat beer from a growler. Through a very successful kick starter campaign Growlerwerks raised a little over $1.5 Million dollars to bring this product to life. The double-walled, vacuum-insulated stainless steel body makes the uKeg just as disaster-proof as it is portable. It keeps your beer cold all day. The 64 OZ stainless steel bottle comes in standard stainless and copper ( For an extra $15 ), and includes a variable pressure regulation cap to maintain its perfect carbonation.