** Designed for TPU Filament **

The design of the spring connector is circular.  It give a better rebound for TPU. Squared springs works for PLA and PETG, but for TPU it's too soft of a rebound making it feels “slow”

A chopstick trainer is helpful because it teaches proper finger positioning and movement in an easy and supportive way. Helps Beginners Quickly Learn: It guides your fingers into the correct grip, making it easier for beginners (especially kids) to start using chopsticks without frustration. 

Many people give up learning chopsticks because it feels awkward. The trainer removes the difficulty and builds confidence, as for children, chopstick trainers allow them to eat on their own earlier, helping develop independence during meals.

In short, a chopstick trainer makes learning easy, fun, and frustration-free.