My thermos flask worked fine for a few months until it suddenly stopped keeping the heat in entirely. How do vacuum flasks stop working? - Quora
![The lid of my thermos cracked when I left it in some water. Some spare copper wire can fix that! : r/ZeroWaste The lid of my thermos cracked when I left it in some water. Some spare copper wire can fix that! : r/ZeroWaste](https://preview.redd.it/0iwia7162n951.jpg?width=640&crop=smart&auto=webp&s=833400e5de7f178595302b1b3c6e757536f17b94)
The lid of my thermos cracked when I left it in some water. Some spare copper wire can fix that! : r/ZeroWaste
![Bestqe Drink Flask, If Grandpa Can't Fix It No One Can 11.8oz Travel Vacuum Insulated Water Bottle Cover Cup Stainless Steel Thermos Cup : Amazon.co.uk: Home & Kitchen Bestqe Drink Flask, If Grandpa Can't Fix It No One Can 11.8oz Travel Vacuum Insulated Water Bottle Cover Cup Stainless Steel Thermos Cup : Amazon.co.uk: Home & Kitchen](https://m.media-amazon.com/images/I/51d605fAjeL._AC_SX466_.jpg)