I had a friend that used wine bottles, like this:

Here is a link that might be useful: {{gwi:137438}}

Thanks for the idea annlat. I love it! I'll start asking friends to save their bottles. Its going to take a long time to get just a few. Oh yeah....and beer bottles too.

I have a friend who used blue insulators.

I have seen old hubcaps, old record albums spray painted, the metal round disks from farm equipment tiller.

Are your trails grass? If so, will you have to trim them? Keep that in mind when using some of the things mentioned above - bottles, plates, records, etc. because they may not stand up to a weed eater. I have lots of beds and don't use any edging. I just mulch good and spray the edge with Round Up a couple times during the summer to keep the grass out. Easy to mow around and works great.

I use flat stones set so the lawnmower can ride on them. But then we have too many stones here in NH. Easy to come by.
I would do some of the other ideas in back of my stones if I felt like being fancy.
I've got some old records i've been saving that my dh keeps threatening to take to the dump...
Kathy

No, they're not grass but we siddenly have this weed down here that is taking over like crazy. I just keep having my son drive his Power Wheels 4-wheeler over and over it. LOL
Records...hmmm now that's a good idea. Guess I'll have to go back to the Goodwill.
I did buy 9 heavy stoneware saucers to line up against the metal edging...we'll see how that works. I'm afraid to use the cheap Corning dishes though. Thanks for the ideas...I really need them.

I have one bed lined with coconuts I pick up on the beach, one lined with Coke bottle "planted" upside down, several lined with old bowling balls, recycled beams from the house when we had to replace them line one bed, driftwood lines another and I am making plate flowers to line a bed in the backyard. No grass here, dug that nonsense up and put in plants.
Tally HO!

I was thinking of doing a garden edged in bottles also. I love those Starbucks Frappuccino and have been saving the bottle. Came up with putting a little paint in them, cap them , shake. Then just stick the cap side into ground. That way you can choose what color you like.
Mary

Awesome idea ladyofdirt! My daughter drinks those. I'll start saving them. I've used cedar logs cut from my trees and, the Texas Holey rocks. --you can find those on Ebay, but they're all over down here. Can't find blue insulators down here but that would be nice lookin' since one of my beds is themed in blue. Thanks ya'll.