Bottle cap coming off and on: sounds like a cap from a bottle getting twisted on and off with different variations of the speed at which it comes on and off. Recorded using the zoomh4n and using the rode ntg1 condenser shotgun microphone. No processing was done to the sound. The bottle and bottle that was used was a 300ml coke bottle.
Request, drop a pill into fizz water and recorde the disslove. I recorded the whole process: open the pill, open the bottle, drop the pill several times, fill the glas with pop-water, drop the pill and waiting for dissolve.