Freezable lunch bag care: wipe the lining and dry with the flap open
For PackIt bags with built-in freezer gel, wipe the lining with mild soapy water, dry completely, then freeze. Other brands may have different care instructions.
PackIt official cleaning and drying instructions for freezable lunch bags
Official source link card: PackIt official cleaning and drying instructions for freezable lunch bags
Open source ↗Do not close a damp bag and place it in the freezer after lunch. PackIt prohibits machine washing, tumble drying, dishwashing and microwaving. Ask the maker about a damaged built-in gel section.