What is this plastic wrap used in electronics?
It's a kind of cling wrap. I bought a small roll of it last time I was the market in Shenzhen for a few CNY. From the photo you can see the color in bulk which is greenish compared to the water clear color of Glad Wrap type cling wraps. In thin layers it still looks clear. 

I've seen similar stuff for sale here in industrial size lots for protecting acrylic sheets etc., but it's nice to be able to score small quantities. 



Probably not static safe (I have not tested it) but good for holding little bits of hardware together. 

Edit: Conductivity between probes less than 0.1nS so definitely not static safe.

Edit2: In fact, the way cling wrap works is that it generates static when you stretch it, which is what makes it stick to itself. So you can't have antistatic cling wrap. That's why another name of this material is stretch wrap, because you have to stretch it to make it work. You can buy it for wrapping pallets, for example. 

Edit3: Oh, those are DIP packages. Didn't recognize them at first. That's not good.