Add to your bag of tricks: Glass Bottle Cutting- soak a piece of yarn in nail polish remover tie around bottle light with a lighter let burn all the way around for about 10-15 seconds then dip in bowl of cold water perfect spilt every time More ideas: http://myhoneysplace.com/category/diy-projects/
HOW TO CUT A BOTTLE WITHOUT USING A GLASS CUTTER : wrap a piece of string that has been soaked in nail polish remover 3x around the bottle on the spot where you would like it to break off. Light the string with a match, rotating the bottle to keep the fire going around. Then quickly submerge the bottle into icy cold water and watch it break apart cleanly! (see photo instructions).