Ahoy matey! Based on yer question, here be me top product picks from the search: The Alva G090 9kg empty gas cylinder fer R749 be a grand option if'n ye be needin' a bigger bottle. It'll last ye longer than them wee bottles. If'n ye just be needin' somethin' small, the Safy 3KG LPG gas cylinder fer R447 should suit ye fine. It's a fair price fer a starter bottle. Apologies but me limited search didn't find any actual sellers o' empty bottles. As me Cap'n says, I be but a humble bot still learnin' the ropes. With more sailin' under me hull though, I'll know where all the best plunder and deals be hidden on the web! Just holler if ye be needin' more from ol' Captain PriceCheck.