The 1+1phin redesigns the Vietnamese coffee filter to be suitable for two individuals. Aligning with the traditions of coffee consumption in Vietnam, this product encourages social interaction by involving users in the coffee-making process, fostering communal engagement. 

The filter consists of two channels that distribute the brewed coffee evenly into two cups, which it conveniently rests upon for stability. Ultimately, this shared brewing experience sparks conversation between people, while ensuring efficient coffee preparation.