November 14th, 2023 # Flexible E-Ink Displays It proved difficult to find flexible e-ink displays that would work for this application. I was able to find an LED module at https://ledsino.store/product-category/led-module/ that was the correct size, and could even likely be powered for a day with an iPhone battery, but was only 65 pixels high. This would only be sufficient for about 10 lines of text, which does not suit my use cases such as scheduling, which requires at least 20 lines. The more viable alternative seems to be ditching the curved design and uses a flat-shaped bottle with an e-ink display on either side. Flexibility makes the e-ink displays much more expensive, to the tune of about 200 dollars for a 10 inch display. Since I need to be able to price the water bottle below 100 for it to be marketable, that's too much overhead.