As an adult, we are get used to drink water easily with open cups and water bottle.
The gravity straw and connector design are different from conventional straw bottle. Heorshe sippy cup is designed to be spill proof and fully enclosed bottle concept.
It has the child to chew and suck the spout so that the water can flow smoothly through the line opening at spout. This process is to promote the use of oral parts such as jawbone, palate and tongue. The spout is also soft and flexible, allowing different sucking patterns.
Baby is fast learner. Lets give them some time and they will pick up the skill.