Eclectic Supply Funnel-1pk-VC Stainless Steel Mini Funnel for Essential Oil Bottles/Flasks Pouring (wide) end diameter = 1-5/16" (33 mm) Insertion (narrow) end diameter = 3/8" (9.5 mm) Fits all bottles 4oz and under sold by Eclectic Supply Stainless Steel Easily transfer your essential oils into smaller dispensers