Amazon with PINK Shop has the SZJCLTD Anti-Loss Hard Shell Travel Case for Oura Ring with Hidden Bottom AirTag Holder, Keychain and Lanyard (5 Colors) for $19.99 - 50% off with coupon code 28XPPM6P at checkout = $9.99 with free shipping on $35+ or with Prime. Also safely stores earrings, pills, USB-C dust plugs, and other small accessories.

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