I use a Lok-Tote back pack. They're great. When my daughter's arrived, we attacked it with the sharpest knife in the house, and we didn't make a dent in the bag or the ropes/straps. The locks are great. Learn more ... https://loctote.com/collections/all?...SAAEgIrdPD_BwE. They are not theft-proof - but they're a major, mega deterrent! No macheté going to cut those straps! And no macheté will break or pierce the fabric. The inner pocket is RFI protected, too. That, and a waterproof cell protector (Mpow has one that floats, and you can use your phone while it's in the case!) ... you're good to go! Lock it to a fence or other immovable, and it's safe - It's all gonna be there when you come out of the water. Or the bar. Or wherever.