I use about a four foot section of 6" PVC pipe, capped both ends and drilled ten 1 1/2" holes along one side. There is also a small 1/4" hole drilled into one of the caps for drainage. The pipes are filled vertically. The growing medium is sifted compost and peat moss. I used bare root strawberry plants. I filled the tube up to the first hole, added a plant, then more soil to the next hole add a plant until all holes were filled. Then the pipe is topped off and capped. The caps are snug, not permanently glued.
I used concrete blocks to provide a stable support for them when laying horizonally, but plan to use another structure to create a larger wall of strawberries. I water when the soil is dry to the touch and let nature take its course. The plants have set out runners that I may try to root and use them to fill next years tubes.
The best thing is there have been zero slugs and no dirty berries!