I think a slide of sandwich for "memory bread", Big and Small Light will be a nice addition to the novelties.
I have already considered your idea. However, for double shot key caps, the "memory bread" may not be a good choice. And it is difficult to find a proper picture of Big and Small Light, since only two colors including the base color are available for a single keycap. Due to the limitation of Doyle shot key caps, many ideas are not available, such as time machine, air cannon etc.