Packit Freeze & Go lunch bags ($20) will not leak or tear, and they will keep your lunch cold for hours. Available in an assortment of prints, the sturdy polyester Packits are lined with freezable gel that eliminates the need for gel packs. Pop the bag into the freezer when you get home and the next day, it will be ice cold and ready for packing. The little bag folds up neatly and has Velcro strips for easy closing and a handle for carrying. About the only convenience it doesn’t have is a shoulder strap. Available at Kitchen Outfitters, Acton Woods Plaza, 342 Great Road, Acton, 978-263-1955; Magic Beans, 776 Boylston St., Boston, 617-383-8296; Tadpole, 58 Clarendon St., Boston, 617-778-1788. JEAN KRESSY