These small bottles are convenient but they are not a good value.
Get an adapter to fill your own or at least get yourself an extension hose so you can run off a 20 Lb. BBQ bottle. Save yourself a shit-ton of money!
One bottle only provides about 21,000 BTU’s , that about 1.5 hours of run time on a dual burner propane camp stove on MEDIUM. How many are you going to need for a few days?
Get a hose!