I thought I'd be thrifty and use a cheap generic duffle bag, but ultimately opted for the more purpose built option.
I'm glad that I did. It's worth the $40, although it really should be included with the stove.

It's nice. Fits the stove in the main body no problem, fits the water tank in one of the end pockets (with another same sized end pocket for extras), has straps on the top to carry an additional pipe section.

The bottom has a rigid plastic insert, which is nice for support --- my only complaint is that there's
no similar measures in place for end or side protection for the stove glass windows.

The winnerwell camping stove bag is the perfect storage and transport container for my woodlander double view large. The material is super tough and durable. The design allows storage of my fireproof mat, 45 angle pipe pieces and more. The top straps cinch down to hold my triple wall pipe section. And the bottom has durable feet to reduce wear. The shoulder strap and handle ease the transport of my stove. Well designed, super tough, and functional. I recommend this bag to anyone using a winnerwell stove. It's the perfect bag for the job.

Carry Bag - Large

very high quality. well pleased with all the winnerwell products.

Good quality. Fits medium stove and water tank in main compartment. Use one end compartment for small torch and two 1 lb propane bottles. Use the other end compartment for small frying pan, coffee pot and couple of mugs. Everything in one place to make camp set up easy.