It seems like it would work well, but there’s too much play in the gap where the knife goes. And these boxes are never tall enough for your soap, so the first inch or so of soap cutting you’re pretty much guessing where you should cut until you hit the slot for the knife.
I’ve been thinking about making cold process soap for years and I often watch videos on soap design on YouTube. When my friend asked me to pick up his favorite coconut soap while I was at the store and I found it was $5+ a bar! $20 in soap later, I decided it was finally time to give it a shot.
Most of the materials below will either link you to Bramble Berry or Amazon. These were the two main shopping sources I used to buy my materials. Bramble Berry is a popular supplier and also happens to be local, so I knew my shipping would be relatively fast.
You should keep in mind that most of the equipment you use will come in contact with lye and should be dedicated to soap making. Don’t eat from, drink from or make food with these tools or in these containers afterwards.