A bit of forever gear
In early 2015, I bought a medium Camp Mat for my new Weimaraner puppy. Over six years later, it's still a part of the gear that goes everywhere he does, giving him a clear spot that's his no matter where we go.
The only thing about it that'd I'd change is add something to make it less prone to sliding around on hard surfaces. Not sure how that could be done without it being a nightmare to keep clean, though.