I use short pieces that neighbors pitch.
Small sizes like 1/2" to 2" diameter are used to make organizers with PVC glues. Base is scrap wood like 1/2" or 3/4" thick plywood.
Two or three inch diameter are used to store tools. Quicker to find than in a toolbox, a length of pvc runs between two pieces of wood. Holes at top of pvc allow tool to stand upright. One piece for my screwdrivers, one for pliers. If a tool is long, a bottom hole in pvc could allow better stability. Unlike the organizers, this does not require glues be used. Spade bits or metal use drill bits are what I use. Krylon type spray paints bonds nicely pvc without use a primer. One of mine is orange, another yellow.