Czech composers like Dvorak, Smetana, and Janacek wrote for the valve trombone, which remains popular in Czechia to this day. Valve trombones were also used by Puccini and Verdi. Verdi helped design and popularized a contrabass rotary valve trombone called the cimbasso. While valve trombones cannot perform glissandos like a slide trombone, valve trombonists can play almost all music written for slide trombone. They can also play music written for the euphonium and baritone horn, and trombonists who can read treble clef can transpose most trumpet music down an octave.