A flow controller includes a housing having central portion and finger-gripping portions on either side of said central portion. The housing defines an interior flow path and includes a breakable member at least partially positioned within the interior flow path of the housing to prevent the passage of fluid through the flow path. The breakable member includes a stem integrally molded to a tubular member. The finger-gripping portions have a cross sectional area greater than the cross sectional area of the central portion. The central portion includes a wall having a selected thickness.