Peltier Rainbos are a later development growing out of the NLR line. Many of the same colors are used but the main difference is in the ribbon NLR ribbons are laid across the surface of the base where Rainbo ribbons extend into the interior of the base glass. Rainbos come in many varieties and colors. Theses are example of some rarer varieties that can be found and some have been given distinct names by collectors.