Hey guys,
So i've been looking into getting better blinds for the place I'm renting (yes) and saw Screenaway, a service where they install a big blind that blocks outside light very well. Looking at the design I figured there must be something cheap and temporary that could be stuck in front of a window that could be fairly easily removed, but honestly I could just be hoping for a product that ultimately doesn't exist. Screenaway, from what I could see, costs several thousands of dollars, I was looking at a few hundred bucks max.
If you are really desperate you can get temporary ones that suction cup onto the glass. They are for kids/travel.