Fluid container with downwardly sloping bottom wall

A fluid container comprising:

• a main body having a bottom wall and a sidewall, the bottom wall having a bottom wall first internal surface, the sidewall extending from the bottom wall and having a sidewall first portion, a sidewall second portion, and defining a passageway extending through the sidewall second portion, the sidewall first portion disposed at a first angle relative to the bottom wall first internal surface, the sidewall second portion disposed at a second angle relative to the bottom wall first internal surface, the first angle different than the second angle, the bottom wall first internal surface defining a curve extending from the sidewall first portion to the passageway at a downward slope, the bottom wall first internal surface having a first width and a second width, the first width disposed adjacent to the sidewall second portion, the second width disposed adjacent to the sidewall first portion, the second width being less than the first width, the bottom wall and the sidewall cooperatively defining a fluid holding cavity in fluid communication with the passageway;
• a support leg extending from the main body and sized and configured to support said fluid container;
• and
• a valve attached to the fluid container and in fluid communication with the passageway, the valve movable between an open configuration in which the passageway is open and unobstructed and a closed configuration in which the valve obstructs the passageway.