Zip Top containers are not designed for taking liquids on the go. Just like you would typically not take soup in a plastic zippered bag in your backpack, Zip Top containers are designed to hold liquids in a kitchen environment. This is why every container says on the back to “keep liquids upright” (which is simple since all Zip Top containers stand up due to their sturdy flat bases). Zip Top containers are wonderful on the go for leftovers, sandwiches, dry snacks, veggies, fruit, nuts, etc.