I combine items in the container, and separate them horizontally using a paper towel, instead of the vertical plastic divider. In spite of sometimes having items with different moisture requirements, I have experienced little spoilage. Generally, the romaine lasts at least 2+ weeks from purchase date. Today, I purchased another lettuce keeper …

https://www.amazon.com/Solutions-Progressive-Lettuce-Produce-Container/dp/B000OUY2QO