The compatibility of your MSR stove with your MSR cookset will depend on the size of both the stove and the cookset. The SimmerLite, WindPro, Pocket Rocket, and SuperFly stoves are small enough to fit in an MSR 1-liter pot. For all other MSR stoves with a flexible fuel line, they will fit into all MSR cooksets that are 1.5 liters or larger, except the DragonFly stove which requires a 2L pot or larger. However, older MSR XGK stoves with a rigid fuel line will not fit inside a cookset. If this is the case, you can store the stove and fuel bottle in the side pocket of most backpacks.