The Stem Cell was one of our first and probably one of our simplest bike packing products. Initially based on our chalk bags we sized it such that it fitted a Nalgene bottle. Our Mytimug was also sized to fit a Nalgene bottle inside it making it easy to stow inside a pack. Recently I was asked by Alpkiteer Paul Errington if I could make him a pair of Stem Cells that would fit our Mytimug, so he could carry his entire cooking setup in one cell. We also added the webbing ladder system that we now used on many other bike packing products, making it much easier to fit a pair of Stem Cells either side of the bike stem. These developments worked extremely well and have not effected any of the original functionality of the product so we are making them standard on this product.