Losing stuff sucks, but Chipolo can help. Their device attaches to any item (eg keys, backpack, dog) like a key ring and then you can use the Chipolo app to ring the item at any point (provided you're within 60m). It let's out a piercing siren as loud as 120db ensuring you'll locate it even if it has half the world on top of it! The battery lasts for two years but even when it runs out you can replace it easily and my favourite thing about the brand is that they remove ocean plastic for every purchase! 🌎