First of all drink ALL the beer: it is rich in potassium, phosphorus and can help you in relationship if you are shy.
Remove the cap. CAREFULLY! It is sharp and hard ( my fingers know ).
Now, if you want, you can finish the beer....not so good i think.
Collect useless electronic stuff (broken muose, hard drives....everything ) to make arm, legs, eyes....
Drill some holes in the bottom to let the water drain.
Fill with soil and make your planter.