flatbottomed
/ˈflætˌbɑtəmd/
adjective
- Having a flat bottom, without a curve or keel (used especially for boats, containers, or surfaces).
- The flatbottomed boat was perfect for fishing in the shallow river.
- She packed her groceries in a flatbottomed paper bag so they wouldn't tip over.
- The children played with flatbottomed toy boats in the bathtub.