Hand Feeder for Bird Training

训鸟上手用的小工具，一个带滑盖的扁平的小盒子，不需要支撑，0.2mm层高, 如果盖子插不进去，盖子的四个角需要用刀稍微修一下来调整盖子的松紧度。 hand feeder for bird training，no need support, 0.2mm layer，the corner of the cover could be trimmed to adjust the tightness.