No need to be a die-hard environmentalist to appreciate any of these gifts featuring the "Ecology Flag" from the 1970s! The symbol was formed by taking the letters "e" and "o", taken from the words "environment" and "organism", and putting them in superposition, thereby forming a shape reminiscent of the Greek letter Θ (Theta). Comes with the caption "Environmentalists Unite!" Make others do a double-take and make everyday Earth Day with a dose of patriotic environmental symbolism with any of these classic gifts!