I'm a huge fan of pipe nails and horseshoe nails for tamper-scoopers for simplicity of design. Sometimes it's good to repurpose other objects for this use. Golf tees are a classic, with the round end as the tamper and the pointed end for pick and scooping. Wooden is good, not plastic. Of course there are various nails and bolts that can be used. Is there anything else that works? I think these have to be non-toxic items, where materials are known, so I'm not sure I'd use a spark plug or other item that might have materials you don't want in your mouth (through being on tobacco that is then smoked). Car parts? Small tools? Any ideas?