I have a month old puppy that I found abandoned on the street. Yesterday I gave it a plastic mug to play with. It went berserk and started trying to eat it. I tried the same with another coloured mug today, the same thing happened. Why is it behaving this way? It first tries to enter the mug and then later becomes angry.
Our pup loves to chew plastic containers, as the crackle noise they make is fun! Our friend has a Chocolate Lab who is obsessed with plastic soft drink bottles for the same reason. Also thicker plastics make a fun noise when they scrape against the floor.
On a note, dogs love to chew plastics as much as anything else, especially if their teeth are developing... Some grow out of it, some don't. Our old mongrel who passed a few years ago loved the plastics of yoghurt pots. Dogs explore with their mouth, so all different hardness and texture variations in fabrics etc for dogs is enticing, especially in the puppy stages.
For a dog so young the only reason I can see him getting frustrated is because it's so new and ideally, when not abandoned, at one month a puppy should be with its mother in a warm soft environment as he wouldn't normally have even finished weening at this age. So it might be that he's still unsure about what this mug is, how to play with it etc, and mum isn't there to show him.
You can actually (and we now have) purchase rubber bone toys which make the same crackle as plastic bottles our little guy loves it and it's a safer alternative to any plastics which may splinter when chewed.