2 empty cylinders can be exchanged at a time with our exchange box. We recommend owning a total of at least 3 canisters. That way, you can always have one in your machine, even as you're sending your other 2 empties in to be refilled.

2 empty cylinders can be exchanged at a time with our exchange box. We recommend owning a total of at least 3 canisters. That way, you can always have one in your machine, even as you're sending your other 2 empties in to be refilled.

2 empty cylinders can be exchanged at a time with our exchange box. We recommend owning a total of at least 3 canisters. That way, you can always have one in your machine, even as you're sending your other 2 empties in to be refilled.

2 empty cylinders can be exchanged at a time with our exchange box. We recommend owning a total of at least 3 canisters. That way, you can always have one in your machine, even as you're sending your other 2 empties in to be refilled.

2 empty cylinders can be exchanged at a time with our exchange box. We recommend owning a total of at least 3 canisters. That way, you can always have one in your machine, even as you're sending your other 2 empties in to be refilled.