The top flavours - Corky's Cherry and Corky's White Chocolate - will be available in 50cl packs, to sit alongside the original 70cl variant.
The White Chocolate 50cl variant has been listed with Morrisons.
PR manager Helen Tungland, said: "Corky's is constantly growing its distribution in the off-trade. We have secured a listing for the 70cls with Bargain Booze and Macro. By launching a smaller pack we hope to widen appeal and attract new consumers - over 25s who would perhaps enjoy Corky's differently from younger adults."