Other forms: nondurables
If something is nondurable, it's not built to last — like cheap batteries that get used up quickly and need to be replaced in no time.
A paper towel is nondurable by design because it is meant to be used once and thrown away. Nondurable can also describe things that aren't well-made and break down easily, like a pair of shoes falling apart after just a week of casual wear. You can even use this adjective to describe intangible things that don't stand up to pressure or the test of time, like a friendship that crumbles under strain.