The stripe and denim combination with a sturdy denim base should keep your lunch box stable. Thank you for viewing. Each item is carefully crafted by hand, so please understand that there may be slight imperfections such as minor shifts or distortions. We appreciate your understanding. ⭐︎Cup Bag 　Outer: Denim, Broadcloth 　Lining: Cotton-polyester blend (quick-drying and wrinkle-resistant) Height 21cm Width 16cm Depth 7cm ⭐︎Lunch Bag 　Outer: Denim, Broadcloth 　Lining: Cotton-polyester blend (quick-drying and wrinkle-resistant) 　Height 19cm Width 26cm Depth 10cm (Measurements are taken with the item laid flat) 　　(Please allow for slight variations) I hope you like it! I have other items for sale as well. Please take a look at my profile if you're interested. Thank you.