I am very new to using any sort of image creating/image altering software - I've only been using Inkscape for about a week at this point. I wanted something easy.
I brought up a grid, drew squares to plot out the heart shape and to allow for etching, and then I outlined the heart to allow for cutting.
I lasercut them into wood and they're just the perfect size for a bottle of beer or a glass. Now all we need is a coffee table so we stop setting drinks all over the apartment and then wondering where they've gone!
I've included my Inkscape file, so you should make your own heart container coasters! If you make some and post a picture in the comments, I'll give you a three month pro membership. I'd love to see yours! :D