>>2920101 (OP)- buy a bag of snow/ice melt salt (calcium chloride)
- fill a pillow case with it and hang it above a bucket
- air moisture will condense on salt, drip into bucket
- the bucket will gradually fill and the salt will gradually dissolve.
be careful disposing the salty water, if you spill it on something like wood you have a spot that will condense moisture for months.