First Post - Etched Wine Glasses

I recently got a Silhouette Studio paper cutter and one of the coolest things I have experimented with so far is etching glass. I have made a few custom beer steins, but since my family is celebrating two birthdays this weekend I thought I would make some commemorative wine glasses!
The design here represents the year (2015), my sister's age (30) and my mom's age (60). Our family is Irish so I added some celtic knot pictures I found on the internet. Here is a photo of the final design on the Silhouette Studio software:

I used the trace function to get the knots, and subtraction to interlace the numerals.

Here is what the sticker looked like after cutting and removing the important pieces.

I had anticipated this problem... Flat stickers do not like to behave on round surfaces. It is important when you are etching (or painting, or stenciling at all) that your stencil adheres cleanly to the glass, no bubbles or folds. Can't really avoid that on a sphere though! I managed to figure out a good application (after 3 or 4 tries). The key is to get the inevitable folds not to intersect the negative space that you will be etching.

Additionally, I wanted to decorate the base of the glass. The rose curve on there has 5 loops so this glass is for my sister, the 5th oldest in the family (including mom and dad).

I managed to make 5 last night, though I will probably have to redo a few. 9 more to go!