Another of my grandma’s household innovations. This one involves taking a velcro band that once held together a bunch of cabbage at the grocery store and pinning it to the window to hold the window curtain in place.
Here it is closed.
And here’s a closeup of the velcro band in action. Not shown: the pin hole on the left side of the windowsill from when she switches sides. It’s the ultimate in cheap functionality. Victor Papanek would love it.