Silica Gel is a porous form of glass that absorbs water, thus a desiccant. Dried ingredients will maintain their crispness longer if in a sealed package with a desiccant. The Dry & Dry brand shown is available in 0.5, 1, 2, 3, 5 grams and beyond. For household uses the 2 gram should be more than sufficient. A bag of 120 2.0 gram paper packs costs 2025 US $8.99 on Amazon. Other brands, quantities, and packagings are available.
Spent Silica Gel can be reactivated by holding at 250°F/120°C
for 1 to 2 hours.