I felt like sketching my double layer plastic glass for Scavenger Hunt 669. Pastels seems the easiest way to show the layers. I put it on a white shelf with white behind it so that I wouldn't have to draw the "things" behind it through the clear plastic part.
I don't like drinking out of plastic in general. Bottled soft drinks or plastic glasses in restaurants are not my thing. And, I don't like straws either. If I can't drink out of glass, I prefer canned pop or juice. Insulated metal cups and glasses have plastic tops so not my thing either. This glass isn't too bad, nice and smooth, and keeps the drinks cold. Plus it doesn't sweat and leave a wet ring on the table.
For Scavenger Hunt 669 https://www.wetcanvas.com/forums/topic/scavenger-hunt-669-feb-27-mar-7/
Number 3, plastic - sketched with pastels on MiTeintes blue gray paper, smooth side. The paper color is drab and doesn't do a thing for the sketch. A dark background would have been better, don't you think? The reflection from the white shelf added an odd reflection with both layers of plastic. Interesting to try to see the reflection and paint/sketch it.