I know it's not a Christmas gift but I ordered a Bell & Howell usb fan a few days ago..in typical fashion it turned up just when the heatwave broke...but it's as amazing as I hoped it would be it folds up small and has a telescopic stem meaning you can use it as a desk or floor fan. A full charge gives up to 10 hours on low setting and it will work whilst being charged. Even on top whack it's quiet and can be taken anywhere..totally impressed for once.
I bought that fan as well and agree with everything you said. I have a really good fan in the bedroom which has meant that sleeping during the recent humid nights hasn’t been a problem, but I bought the Bell & Howell one for use downstairs. I actually already have a tower fan and three desk top fans (can you guess that I don’t “do” heat ) but I prefer the B&H one because it’s less obvious when not in use. And as merryone said, it’s really portable and effective.