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Ion-transfer voltammetry at the liquid-liquid interface is a powerful tool for the label-free detection of non-redox-active ionic species and for the mechanistic investigation of ion and electron transfer processes at liquid-liquid interfaces. Apart from analytical applications, these interfacial phenomena are highly relevant to developing next-generation electrocatalytic, photoelectrocatalytic, and energy-storage systems. However, conventional ITIES cells (interface between two immiscible electrolyte solutions) require custom fabrication and large volumes of often toxic organic solvents (5–10 mL). Considerable volume of the organic phase limits their applicability to investigate scarce, expensive, or newly synthesized molecules. Although existing miniaturized formats reduce solvent consumption, they introduce asymmetric diffusion profiles that complicate data analysis and require greater operator skill. Here, we introduce a miniaturized electrochemical cell that maintains a macroscopic liquid-liquid interface with symmetric diffusion from both phases. This design enables direct comparison with established ITIES studies while drastically reducing reagent consumption. The device is constructed from readily available laboratory materials—a glass spectrophotometric cuvette and a Pasteur pipette—and requires only 150–200 µL of each phase. Its transparent design enables real-time visualization of interfacial processes, including deposit formation, bubble evolution, and microemulsion development. The compact configuration is fully compatible with spectroelectrochemical measurements. We demonstrate the cell's utility through spectroelectrochemical characterization of electron-transfer reactions involving ferrocene/hexacyanoferrate and a newly synthesized organoboron ferrocene system.