32oz is enough space for just about any trail meal. With the screw on top storing left-overs is incredibly easy. Also, washing is a breeze. Just screw on the top and give it a good shake with some boiling water - just make sure the top is screwed on really tightly. The most valuable feature of this product is the measuring cup gradations. With this, there is no linger a need for estimating or trying to use a Nalgene. All-around this is a well-made and versatile product.