What if it also kept cold drinks cold all day, so it's a lunchbox and a mini fridge in one?
Worth building: No
The emotional need is real and technology exists, but manufacturing complexity and supply chain risks make this a high-risk build. Only pursue if you can simplify the design and target specific premium customer segments who will pay $60-80.
e
o
r
Assessment grounded in independent analysis from elon-musk, oprah-winfrey, ren-zhengfei