Drop this food container reservoir into the bottom of a utility bucket and you'll have an instant sub-irrigated planter. Or, use it inside any watertight container to grow any plant of your choosing be it edible or decorative.
It looks a bit grungy in the photo because it was buried inside a milk crate planter last summer. The soil wick in the center is a deli container, which just happens to fit under the cover. It has holes poked all around the bottom edge to allow water to rise by capillary action. The fill tube is made from flexible plastic tubing. It holds about one gallon of water. If you're using this outdoors remember to make an overflow drainage hole in the bucket or other watertight planter.
Originally, the container was the packaging for cookies from Costco. Unfortunately, the brand was discontinued. Fortunately, I ate many of those cookies and have many of these containers.
If these food containers were more widely available, it would be my recommended reservoir method for home made sub-irrigation planters of many types. Tell us if you know of a food product that comes in this type of container by posting a comment.