This a cheaper implementation of a single button module, similar to the Amazon Dash button, which were a convenient thing in the past, dedicated to a single product, and with the press of a button, you can order an item.
Amazon stopped producing it, or selling the product, making it obsolete. However, with the RF433MHz single button remote control, and a 3-D printed shell with magnets, it is now possible to create your own dash buttons, as many as you want. These are dirt cheap that you can grab one of these remotes for less than $2-3 in most cases. Just choose your nozzle size. I printed it on PLA, at 0.16mm.
The button is connecting to a RF 433MHz controller, which is connected to my Home Assistant, and NodeRed, so that I can choose to do different things based on my needs.
As a dash button, you can assign individual products, and add a shopping list entry, once the button is pressed.

Here is link to the sample one button remote: https://www.alibaba.com/product-detail/White-1-button-remote-control-wireless_1600075743753.html