Three different lactate esters were functionalized with photopolymerizable groups in high yield reactions, followed by their successful implementation as novel bio-based monomers for ink formulations in 3D printing. Outstanding 3D printability was achieved with all three lactate ester ink formulations and the printed materials were characterized in depth. To implement an end-of-life option, the printed structures were upcycled via aminolysis. Following this procedure, the crosslinker employed in the ink formulation could be re-synthesized and used for subsequent printing. Beyond, green chemistry principles were followed throughout, taking bio-based inks for 3D printing a step towards full sustainability. We believe this work will open new avenues in the design of sustainable materials for 3D printing and contribute to the revaluation of bio-based 3D printed waste.