Alarm for when hands go near face. Wearer's necklace senses either proximity, presence in range above it, absence in range below, or other, of wearer's bracelet sensors, and sounds an alarm, vibrates, or both, configurable by user.
This cash registers (same could apply to ATMs) have slots for bill denominations and a scooped set of slots for change. Inside is a strong UV light that kills microbes, so that bills entering are heated and blasted to be cleaned. There is also a tray for the machine to dispense change in dollars and coins.
To be updated as I find time.