Geopolymer is one of the most popular construction materials and serves as an alternative to the conventional cementitious materials with comparative mechanical properties, minimal drying shrinkage, and environmental-friendly features. In recent years, the aim of getting more environmentally friendly and sustainable development of geopolymer materials is becoming attractive. To guarantee the suitability and workability of geopolymer in construction, it is essential to evaluate and regulate its flowability. In this paper, various waste materials were used to synthesize geopolymer mortar. Glass cullet was used as fine aggregate for sand replacement. Fly ash, ground granulated blast furnace slag and glass powder were used as binders. By testing the flowability of geopolymers under various mix design parameters, the viability of geopolymer mortars using different recycling waste glass products was evaluated. Based on the research in this paper, as the aggregate content increased, the flowability decreased significantly. As the glass cullet content increased, the slump flow value first increased and then decreased. However, as the glass powder content increased, the slump flow value was a significant reduction.