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Lightweight and environmentally friendly glasses made from empty plastic bottles.
Take the razor blade and mark where to want to cut. I just slightly indented around the circumference. Sorry, the picture turned out to be upside dow...
Cut along the line. I used these pointy scissors, as they worked the best. You can sand the rough edge if you want to. Tighten the cap on the botto...
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Simple and almost free.
Keep it up.