1、 准备材料哦
3、 剪一块圆形的布做底哦。（要比矿泉水瓶底大一点，方便缝合）
6、缝好后，将袋子整个的反过来。
7、 将剪好的矿泉水瓶装进袋子。然后再把多出来的部分塞到瓶子里面去。稍稍整理一下，笔筒就完成了啊。
![废物利用：[2]矿泉水瓶变笔筒](https://exp-picture.cdn.bcebos.com/8db0c6a726334884c2c38998ddee7b7f870e45b4.jpg)
![废物利用：[2]矿泉水瓶变笔筒](https://exp-picture.cdn.bcebos.com/87645f93cee8b0047f3b13bb79260d9a300ea9b4.jpg)
![废物利用：[2]矿泉水瓶变笔筒](https://exp-picture.cdn.bcebos.com/76b6860e5f2043711afbf494323acd8921c58fb4.jpg)
![废物利用：[2]矿泉水瓶变笔筒](https://exp-picture.cdn.bcebos.com/890dfb4a2f27e7ef7726a9b519dd3340b7f3f5b4.jpg)
![废物利用：[2]矿泉水瓶变笔筒](https://exp-picture.cdn.bcebos.com/ff5c88d818196120d2edceda70f202b374d7dfb4.jpg)
![废物利用：[2]矿泉水瓶变笔筒](https://exp-picture.cdn.bcebos.com/cd93a566515985409e0ac656b5a23a42a17ac4b4.jpg)
![废物利用：[2]矿泉水瓶变笔筒](https://exp-picture.cdn.bcebos.com/023cff37c97622bcd7e50dd3a05fd546049628b5.jpg)
![废物利用：[2]矿泉水瓶变笔筒](https://exp-picture.cdn.bcebos.com/3aae2b4f50b8b43e13fb95fe7132939c2df719b5.jpg)