Left: stellar host metallicity plotted as a function of eccentricity for all warm Jupiters that reside in systems with at least one additional giant planet. Metal-poor ([Fe/H] < 0) systems are in gray and metal-rich systems ([Fe/H] ≥ 0) are in orange. Right: host star mass plotted as a function of eccentricity for all warm Jupiters that reside in systems with at least one additional giant planet. Lower-mass systems are in blue (M_⋆< 1.15 M_⊙) and higher-mass systems are in gold (M_⋆ ≥ 1.15 M_⊙)