desiccant

a small packet of 'desiccant' to absorb any moisture

One ingredient found in almost all tablet or capsule containers is a 'desiccant' - cotton batten or a small canister containing a harmless, water-absorbing compound.

Silica gel isn't a true gel, but a granulated chemical 'desiccant' composed partly of silicon.

Anhydrous sodium hydroxide is another common laboratory 'desiccant' , or substance that removes water.

Unlike cooling-based dehumidifiers, which cool the air to condense moisture, 'desiccants' attract moisture molecules directly from the air and release them into an exhaust air stream.

However, 'desiccants' contain chemical agents that may be toxic to children, pets, and the chemically sensitive.