Reusable Moisture Absorber for grain storage

[Brewed_Force]

Hi,
I'm looking for a reusable moisture absorber thingy to put in my grain container. Preferably something small and cheap! Any ideas?

 

[Clint]

Sit a bowl of salt on top of it...

 

[Pheqit]

I use a Pingi Car Dehumidifier (think Argos are cheapest @ £3.60). Once the spot starts to turn pink just microwave it and it`s good to go again.