Purdue Improved Crop Storage (PICS) bags were identified as a potentially impactful intervention in terms of reducing post-harvest loss from pests and moisture. Designed by Purdue University, PICS bags were initially created to stop post-harvest loss in legumes in West Africa, and their use has now spread across the continent. PICS bags are made up of three nested plastic bags; the inner two hermetically seal when closed properly. One Acre Fund Tanzania sought to encourage farmers to shell and store their maize early. One Acre Fund Tanzania performed several phases of trials with PICS bags, beginning with an assessment of impact and then moving on to adoption/feasibility.