16 ounce propane tank - refillable - $5 (Columbia)
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Keep a spare propane tank handy... refill from a 20 pound tank
This is an empty cylinder, you need to have a fill device on hand. https://www.amazon.com/Propane-Refill-Elbow-Adapter-Outdoor/dp/B0DR75V9L9/ref=sr_1_1_sspa?crid=1D7LIS94KJR4P&dib=eyJ2IjoiMSJ9._ZNQxxu1s_vNwUJ6TK3PQ53ocLrqtmlgpqYrjLeOH-BQS1MWMlFcrdw4_TC8CKkGfxHwA22MN-dm-Z1VzidraAKX6O7wuOxGFxBjVacdA2tb26PfUqyoT0YVcGXlvNSYJZq4eIRDWlDBnbfSD38lBG0GZfj00ntYw6Ols66-4NRx4uRPmagQHB5S8JPAO_bOtpLsMFSCXZqS1MyZEkp1JKKhqk8zBnPVr_pVHVpnLwE.aUOtflFdDGZWoWpRsXa94UzyP59w4Ij93aWgQqUlZik&dib_tag=se&keywords=propane%2Btank%2Brefill&qid=1767937297&sprefix=propane%2Btank%2Brefill%2Caps%2C258&sr=8-1-spons&sp_csd=d2lkZ2V0TmFtZT1zcF9hdGY&th=1