Stephen Joseph Freezer Friends  Butterfly IMAGINATIVE DESIGNS: Bright colors & characters make these freezable friends extra fun for kids lunchboxes. Your child is sure to find a design they love! SPECIAL FEATURES: Non-toxic gel filling helps keep food cold for up to 6 hours. Each freezer friend is reusable & washable. HIGH QUALITY: BPA & phthalate free, each character measures 4.25x 5.75 and is FDA approved.