For me, it’s an electric toothbrush. It doesn’t matter if you go with Sonicare or Oral-B, once you start using an electric toothbrush, regular toothbrushes don’t ever feel like they clean your teeth properly. The smooth plaque-free top layer of your teeth that you can feel after using an electric toothbrush can’t be replicated with a regular toothbrush.
I think OP’s point in asking this was so that people could buy the things that other people thought were useful.
No one knows what this is, other than some “generic ice cube tray”.
The picture is pretty self explanatory imo, its an ice cube box that makes proper ice cubes, comes with two trays so you can make a whole bunch at once, the box acts as convenient storage so you can prepare a ton of cubes ahead of time, and the lid works as a tool for getting all the cubes in a tray out at once, without having to press them individually like on some other solutions.
The picture showcasing the well thought out design was preferable to posting a link or naming a specific manufacturer, since its a generic design you can find on Aliexpress or other sites from various brands. It should be easy to find by just looking up “ice cube tray box” or something.
A picture gets the idea across more easily than describing the product I think, and leaves less room for interpretation.