It sounds like you're referring to Polac Sweet Corn in a 400g can or packet. Polac is a brand that offers canned and packaged food products, and their sweet corn is likely a convenient option for consumers who enjoy the sweet, crunchy texture of corn but want the ease of having it pre-cooked and ready to use.

 Here’s a little more about Polac Sweet Corn

- Product Type: Typically, Polac Sweet Corn would be either whole kernels or creamed corn, preserved in a can or a vacuum-sealed packet.

- Size: The 400g size is a standard serving size, which is a good quantity for side dishes, soups, stews, salads, or as an ingredient in various recipes.

- Use: Sweet corn is widely used in cooking for dishes like salads, tacos, casseroles, and as a side dish. It can be heated and served, or added directly to recipes without much preparation.