brimless

/ˈbrɪmləs/
adjective
  1. Having no brim; describing a hat or container without a projecting edge.
    • He preferred brimless caps because they were more comfortable under a helmet.
    • The brimless cup made it easy to drink from, but it didn't keep the heat in.
    • She wore a stylish brimless hat that sat close to her head.
Antonyms
What does "brimless" mean? | whatsthatwordmean | whatsthatwordmean