It is super lightweight it feels like an empty bottle. The weight of the bottle is around 160g± maybe even lighter than an apple. The Oxygen bottle filled with Oxygen measured with Pressure Analysis around 8 Bar. Standard normal use just presses on it one second and breath normally.
********no liquid inside, no sound inside when shaking the bottle
O-MILLA EASYCARE Portable Oxygen Inhaler - (For Home, Medical, Outdoor, Travel Use )
Brand : O-MILLA EASYCARE
◾ Product : Portable Oxygen Inhaler
◾ Oxygen Purity : ≥99.6%
◾ Content : 1000ML