YOU need to make sure that your freezer unit uses R290 refrigerant!
Frigostar R290 Propane 370g Refrigerant Gas (Pack of 12)
Frigostar Car Aircon 1234yf Air Con Air Conditioning Top Up Recharge Refill Regas DIY Gas Can 370g
Frigostar Refrigerant HC, 134a Replacement Kit for Car Air Conditioner
12000 BTU Portable Air Conditioner, A++ Low Energy Mobile Air Conditioner with R290 Refrigerant, 4‑in‑1 Portable AC Unit – Cooling, Dehumidifying, Fan Mode, Follow‑Me Function, Approx. 50 dB
Portable Air Conditioner 10000 BTU, A++ Energy Efficient Mobile Air Conditioning Unit with R290 Refrigerant, 4‑in‑1 Mobile Air Conditioner, Cooling, Dehumidifier, Fan, Follow‑Me Function, Quiet 52 dB
Portable Air Conditioner 9000 BTU for 30–40 M², 4‑in‑1 Mobile Air Conditioner with Exhaust Hose, Cooling/Dehumidifying/Fan/Follow Me, R290 Refrigerant, <50 DB Quiet Operation, 24‑Hour Timer, Remote