$250×1200=300000(\mathrm {mL})=300(\mathrm {L})$;$500×600=300000(\mathrm {mL})=300(\mathrm {L})$
$750×400=300000(\mathrm {mL})=300(\mathrm {L})$;$1500×200=300000(\mathrm {mL})=300(\mathrm {L})$
答:成反比例关系,因为每瓶容量$×$所装瓶数$=$这批醋的总量$($一定$)$。