“What is this thing? Looks like an inflated plastic bag sticking out of the window of one of the houses on my street.”
Answer: “It’s a positive pressure vent. It’s used when mold is being remediated. When a demo of the affected area is being done, it causes dust with mold spores in them. The tube is hooked up to an air scrubber machine, and that tube sticking out is the machine’s exhaust.”
#17 it's also very practical because the tea dripping from the teabeg spills everywhere when you tilt the cup while drinking.