nice initial idea but i think there is a slight lack of understanding on the care of bettas, i dont doubt that there is lack of love but the extra little bits make a much healthier lifestyle for the betta.
They need stimulation due to their level of intelligence and the bamboo doesnt provide this what so ever, its purely there b/c you think it looks, pretty or cool, which ever way you class it. They need places to hide, sleep, explore etc.....
The comment about the water level isnt justified, if you see the top of the bowl you will notice that the bamboo is vertical which suggests that its being held into place by the lid or whatever is on there, this will restrict the flow of oxygen to the water surface, having a good air flow is far more important so i would reccommend removing the lid completely but keeping the water level at the same hieght to allow him to have more surface area to breath from, adding more water will only reduce the water surface area
The style of the bowl is fine but it could be bigger so that you can add things, something thing a larger rim would be best so that you can easily add things to the tank, the water changes in this small item must be very frequent as you do not have a filter.
Just buying a betta and plonking it in a glass item with some water isnt the correct way of creating a suitable environment for these lovely little fish, a step back to consider the bettas needs before your own would be an idea as you can still make any tank look trendy and cool with a bit more imagination with things that will keep him stimulated, a main rule of bettas is no matter how clean your water is the lack of stimulation will cause stress evenually which will reduce the bettas immune system and you'll find yourself posting threads on how to compact problems.