Plastic Crocheted Coaster

Here it is, my first attempt at crocheting with plastic bag yarn. Turns out my yarn was too short though, so it's a three-quarter coaster. Why? Because I don't have the same kind of plastic bag anymore.
It kinda looks like a lollypop, with the red stripes. :p

Here is the pattern I was following.

One thing I've learnt, DO NOT use thick plastic bags. Or at least, make sure you cut them into thinner strips or use one strand instead. You don't want to hurt yourself. Believe me. Even now my fingers are still sore from struggling with it.
I don't know what will happen if I make yarn out of different kinds of plastic bags, but for now, I'll avoid that. I got the feeling it's not advisable. Not easy though, cos I usually don't have many of the same kind, let alone the same color.
Another thing, use non-printed plastic bags when available. The paint will came off and stick on your hook.