RSL Group via Amazon offers Prime members this Waterproof Floating Camera Wrist Strap 2-Pack in five colors (Orange/Red pictured) for $10.99. Coupon code "WVB7XV6X" drops it to $3.50. With free shipping, that's the lowest total price we could find for comparable straps in this quantity by $6. (Non-member can spend $35 to qualify for free shipping; otherwise it adds $5.07.) The brightly colored straps are filled with a buoyant foam and are compatible with many waterproof camera models.