If you can buy ziplock, you can certainly buy a cheap bigger airtight sandwich box. Pour only half and keep the rest. Put envelopes from your monthly bills over the silica gel and camera on top as not to scratch the equipment.
The reason why your silica becomes pink fast is bec ziplock bag is not fully airtight and surface breaks with each use. For long term non contact storage, double layer is required.
* keep important receipts, certificates out of the box as they will turn brittle. And remember to close the lid properly. Do you know cockroaches like to chew on ziplock bag too.