2-piece set includes larger stainless steel Oval container plus a no-leak Snack Cup with silicone lid. All together, the set's total capacity is 30 oz (3 3/4 cups). The Oval lunchbox's capacity is 24 oz (3 cups) and the Snack Cup's capacity is 7 oz (3/4 cup). The round Snack Cup is leak proof since it has a silicone lid, but the larger Oval container is NOT leakproof since it has a steel lid without gaskets