For people like me who had to look it up:

The dramatic, symbolic use of a trash can to dispose of feminine objects caught the media's attention. Protest organizer Hanisch said about the Freedom Trash Can afterward, "We had intended to burn it, but the police department, since we were on the boardwalk, wouldn't let us do the burning." A story by Lindsy Van Gelder in the New York Post carried a headline "Bra Burners and Miss America." Her story drew an analogy between the feminist protest and Vietnam War protesters who burned their draft cards. A local news story in the Atlantic City Press erroneously reported that "the bras, girdles, falsies, curlers, and copies of popular women's magazines burned in the 'Freedom Trash Can'". Individuals who were present said that no one burned a bra nor did anyone take off her bra.

The parallel between protesters burning their draft cards and women burning their bras were encouraged by organizers including Robin Morgan. The phrase became headline material and was quickly associated with women who chose to go braless. Feminism and "bra-burning" then became linked in popular culture. The analogous term "jockstrap-burning" has since been coined as a reference to masculism.

The idea of simple linear series of waves of feminism is as at least as harmful to understanding as any version of feminism has been to, well, anything.

(But, if you must adhere to it, everyone that matters has moved on to fourth-wave feminism these days.)