this winter i was at the ben & jerry's in waterbury (because it has ingress portals, ok?) and it was cold out. really, really freakin' cold out. and they have these reflector thingies all over to tell you if it's cold out or not, because i guess people who come from away need reminders that there could be ice on the ground and they should not walk carefree like they do wherever they came from.
it's a real product, and i can see where it might be especially useful in a place where there is moisture and an ambient temperature that hovers around freezing.
still, i got a chuckle.