Glass Liner Protection
Here's one way of protecting the glass liner of a thermos.
A little padding can prevent the glass liner in thermos bottles like this from breaking.
Does the glass liner in your thermos bottle have a "tendency" to break? You won't have that problem anymore if you follow this tip from Bill and Sandy Penny of Waynesboro, Virginia: snugly pad the air space around that fragile inner cylinder with six to ten layers of paper towels.