text: I always use wood wicks, tube, cross, straight, and a shape but I mostly use them for 30cl, I trialing tube wicks in 20cl tins today, there is a guide on cs store to size, for vessels but now and then you have to, test as some fragrance oil acts differently but I do find cs1 great with the wood wicks, pure soy can be a pain, order 2 or 3 of each one it recommended and go with that.