The way the design could be improved is it if was waterproof. The design is water resistant but it would really be a useful tool if the whole watch was waterproof in which people can really wear it at all times during their everyday lives.
Transform your Apple Watch into a locket necklace. This Pendulum Collection accessory fits into the band slots of the Apple Watch; simply slide your wrist bands out and slide your Bucardo accessory in. Enjoy and wear your Apple Watch in a different way.
Amazon.com: Apple Watch Band, MoKo Soft Silicone Replacement Sport Band for 42mm Apple Watch Models, Mint GREEN (3 Pieces of Bands Included for 2 Lengths, Not Fit 38mm version 2015): Cell Phones & Accessories