I first intended to draw a line around the top of my bottle where I wanted to cut it, but then I noticed that where I really wanted to cut was along the line of where the bottle curves up to the top so I didn’t really need to draw a line as the bottle naturally had a line to follow. If your bottle is more straight up and down then you can use a measuring tape to measure the height you want your vase to be and draw a line at that level all around the bottle with a sharpie. Use that line as your cutting guide. Ideally draw the line a tiny bit higher than where you actually want the top to be.

I started by piercing the bottle a little bit above where I wanted the top of my vase. The hole I made was just large enough to get my scissors into. I used a steak knife (because it was nearby), but you should use a craft knife as they are safer! Either way keep a good grip of your bottle while you make your fist hole so you don’t slip and hurt yourself.

Once you can get your scissors in just cut around the bottle to remove the lid.