Do this at your own risk FYI...

Flame King Refillable 1LB Empty Propane Cylinder Tank - Reusable - Safe and Legal Refill Option - DOT Compliant-16.4 oz (2-Pack), https://amzn.to/3OhXsfu

Flame King Refillable 1LB Empty Propane Cylinder Tank - Reusable - Safe and Legal Refill Option - DOT Compliant - 16.4 oz, Green (single can) https://amzn.to/3SAyTNF

Flame King Propane Refill Fitting Adapter Valve for 1LB Camping Refillable Tank Cylinders https://amzn.to/3SJQGlH

Lemfema Propane Refill Adapter with Propane Tank Gauge and Shut Off Control Valve for 1LB. Tanks, Fits for QCC1/Type1 Propane Tank Refillable for Camping Grill 1LB Cylinder Tank https://amzn.to/3SiLx2e