Make your own desiccant bags.

When you receive goods from near and far, there is almost always a desiccant in the packaging in the form of small bags of Silica gel. These bags can be successfully regenerated several times by drying them in a hot air oven set at 120 Celsius for 2 hours.

Bags of Dri Clay are not as useful.

Using (Melitta 1x4) coffee filter, draw a line 8 cm from the folded edge on the filter, then 2 dotted lines 7.5 and 7 cm from the edge.

Then draw 2 dotted lines 0.5 and 1 cm from the rounded edge, with the first line hitting this and at the folded edge.

Now cut with scissors along the full drawn line and fold 2 times around the dotted lines and then staple the folded edge.

After filling the desired amount into the bag, it can be closed by folding around the round edge and then closing the bag by stapling it.

Melitta filters are reasonably robust and can be regenerated in a hot air oven as described above.