USB case dedicated to DADs. It can be a nice hand-made present for the coming Fathers' day as well. For suitable memory stick visit amazon at http://www.amazon.com/V7-Mini-Flash-Drive-VU24GCR-YLW-2N/dp/B00AZG90E6/. These models do not need any support while printing. 0.8 mm wall thickness and at least 15% infill is recommended for stability. For more models visit http://customflashdrive.co.uk/3d-print-your-own/