I love my Thermapen, but I did find an awesome alternative at restaurant depot that registers in the same amount of time for around $25. So there are definitely alternatives.
Shirley Fabrication Offset Awesome Pit
Backwoods G2 Party & G2 Chubby
Big Green Egg XL
Weber 18.5 Kettle
"Tenacious Q" Competition Team, Head Idiot
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