Cute Sausage Dog Pen - Assorted Colours Sold Separately By Lotusandlime Fun Plastic Sausage Dog Pen. Need a funky pen that looks great and fits into your pocket or handbag then look no further. These great gift items are colourful and come in a variety of unusual designs. These durable little pens are made from plastic and have a black biro inside. They are perfect when you are on the go at home or in the office.