General Post Office (GPO) Lucknow introduced designer waterproof envelopes for Raksha Bandhan. These waterproof envelopes are available at a cost of Rs 10. Women are using it in large amount to send 'rakhis' to their brothers. These envelopes provided a sense of satisfaction among customers that their 'rakhis' will reach safely. While speaking to ANI, Chief Postmaster RN Yadav said, "The envelopes have been sent across the state. There's a stick-on side on it, so you need not use glue. They're available at a cost of Rs 10." Raksha Bandhan is a Hindu festival and celebrates the relationship of brother-sister. 'Raksha Bandhan' is a Sanskrit word, which translates in English to "the bond of protection, obligation, or care".