hi wallacetham
i'm actually a user of an airtight tupperware with silica gel. to prevent silica gel from scratching your equipment, put into a sock. however, being a user of silica gel, i have experience many inconveniences. i didn't want to get a dry cabinet because i had only wanted to keep a body with a kit lens, so a dry cab was unnecessary. however i soon realised my silica gel turned purplish pink just 2 days after i placed it into the tupperware
each time you open the tupperware to retreive your gear, the humidity rushes in and your silica gel becomes pink quickly. you either heat up your silica gel to reuse them, or spend lots of money buying new silica gel. however, after much reading, blue silica gel is harmful when heated because of a substance which is carcinogenic (cancer causing agent). i'm sure you wouldnt want that to happen to you or your family members. i heard there are orange silica gels which arent carcinogenic but are not available in singapore
i have just purchased a digicab 30L dry cabinet and have expanded to 3 lenses, 1 flash and 1 body. =)