Hanna Andersson Flash Sale $29 Backpacks & $10 Foldover Lunch Sacks TODAY ONLY Today only, head on over to Hanna Andersson and shop their back-to-school sale as they are having a flash sale. $29 backpacks and $10 foldover lunch sacks. Backpacks are regularly priced at $45 and lunch sacks $16. Huge savings on high quality must-have items for school. Many fun designs for boys & girls. This back-to-school flash sale is valid July 29, 2014 only. Shop backpacks Shop lunch sacks.