Abstract: Fuel receptacles and related systems are described that are tamper resistant. A fuel receptacle can include a housing having an opening through which fuel contained therein may be delivered to a fuel consuming device along a fuel path and a biased element. The biased element can be contained with the housing having an orifice and a notch and it can sealing the opening when biased into a first position. The fuel consuming device can contain a protruding member to contact the notch and cause the biased element to move along a plane perpendicular to the fuel path into a second position when the fuel receptacle is coupled to the fuel consuming device. The second position can cause the orifice to be aligned with the opening thereby permitting fuel to be delivered to the fuel consuming device along the fuel path.