Here's a close up of the drink. I used Crystal Effects to get it so shiny. I think it makes the glass look more like a glass. It's got a little spot where I touched it before it was dry. Otherwise it would be smooth. You can't see it so much on the card. It's just very noticeable since it's enlarged.
Here's this week's sketch. Use it to inspire you!
You can see the LNS Challenge entries here. Maybe you'll want to make an entry that works for both challenges like I did.