This is probably silly for the #homeassistant geeks, but being a n00b of #homeautomation, I find it cool...
We use a #sterilizer for our #daughter #babybottles . Once sterilized, can be used in 24 hours, otherwise must be sterilized again, as per OMS guidelines.
We always forget when the bottles have been sterilized, so I connected the sterilizer to a #smartplug that can monitor power and created an homeassistant sensor based on the power usage, so we know when the last sterilization run has finished! Spouse-approved!