If you don't want/need a popsicle stick in the finished apple, I agree with Irena that a silicone 3-D mold would be a better choice. They tend to be more expensive since the cost of silicone is considerably more than hard plastic. Most silicone molds are made by hand. The hard plastic molds are made by machine. There are many 3-D silicone apple molds around, in all different sizes. Depending on how it will be used, a typical shower/bath bar will be about 4 ounces. A hand soap, between 2 and 3 ounces (or smaller).
By the way, the apple mold you linked to makes an 8 oz soap - that's very big. Seems like you get four "parts" to a sheet, so you can do two apples at once. It doesn't look like it has a pour spout, which means you'll make the two halves separately and "glue" them together with clear soap and then trim. They will hold together, but it's not an ideal solution and fairly labor-intensive. I've never had success using molds like this one. Something always goes wrong.
The best hard plastic 3-D molds are carried by Bramble Berry, but they don't have an apple, last I looked. Here's a link to their instructions
http://www.brambleberry.com/Webpage.aspx?WebpageId=73I sell a bunch of 3-D rope soaps using the Bramble Berry molds with the spouts. They are great. Careful with fragrance choices -- some will "pit" the plastic, so do a test first with a couple of drops of fragrance on the side/edge of a mold and let it sit for several hours to see if the plastic changes and leaves small bumps/pits in the plastic. I've "killed" five or six hard plastic molds before I realized it was the fragrance creating a chemical reaction.
I've never bought anything from GoPlanetEarth (they carry the Mold Market molds), but here's their tutorial on how to use the molds with a pour spout built in.
http://goplanetearth.com/project_3D_OvalLeaf.htmlWhatever you do, have fun and let us know how it turns out
Connie
http://www.etsy.com/shop/SoapRhapsody?s ... d=10056477 (for pictures of the 3-D rope soaps)