These wooden sticks ought be be a lot more functional than standard chopsticks assuming you will use the sloped extremity, you'd only need to cut it on both sides to make it more pointy but leaving a flat side (like a bullet train). If you have access to Bonsai Mirai videos check it out, there is a reason behind that. Briefly, as you chopstick the normal vector from the slope defines the direction that particles of substrate are pushed to whereas the particles in the other flat side are minimally disturbed. With such a geometry to the chopstick it allows you to have control into which directions you want to move substrate to. A standard chopstick on the other hand will move substrate in all directions equally and as you remove it particles from all directions refill the space, making a less efficient and controllable use of the technique.