That led me to consider filling a sandwich with other vegan sushi ingredients, and in turn review some of my old sushi posts, which led me to this one. (connoisseurusveg.com)
It's easy enough to check for leaks — just fill a sandwich bag about halfway with water, zip it up, turn it upside down, and shake it around. (thespruce.com)
Fill a sandwich bag with glitter, place egg inside and shake to coat glue dots or strips. (hgtv.com)