Here’s my take on a spam musubi maker. All edges are rounded including bottom and top.

Musubi Assembly:

1. Line container with plastic food wrap (the food wrap is essential to get a nice final product and prevents any need for food to touch the printed mould.
2. Insert strip of seaweed (nori). 1-2” x 6”. Seaweed strip should align with the two openings of the container and stick out.
3. Insert slice of grilled or bbq’d spam (a little teriyaki glaze on the spam works well).
4. Insert rice to approximately 3/4 full on top of the spam
5. Wrap the nori strip over the rice and fold one side of the food wrap over it.
6. Compress firmly with the lid
7. Pull out contents using the plastic food wrap and finish wrapping tightly. The musubi needs to set for a few minutes before unwrapping to eat or can be left wrapped for later.

Note for Spam cutting:

I designed this to get 10 musubis using 1 can of spam. It is important to slice your spam following these steps. Lying the spam on its side on the cutting board, cut it into 2 equal pieces. Turn each of the pieces 90° and cut into 5 equal slices (if you like the spam thicker cut it into 4 pieces). Cutting it this way will make it perfect to fit this musubi maker. See picture of cutting guide.