Penguin Pools offer you the best on True L Vinyl Liner Pool Prices. The True L inground swimming pool design is a modified rectangle pool that gives you longer shallower end, and true to its name, looks like the letter “L”. We extend the shallow end out to give you more area to play and hangout. It’s more ideal pool for those with families and younger children. We offer a variety of True L pool dimensions for you to choose from, and customization is always encouraged.