Water-based formulas are the most universally safe and effective, suitable for most toys, condoms, skin types, and activities. Because the products are water-soluble, they are easy to clean from the skin, fabrics, and other materials.
Water-based formulas can be made in different levels of viscosity (thickness) for different use, and because they are naturally flavorless they provide an excellent base for flavored products.
The only downside is that they can dry up quickly, so keep the container close at hand to reapply as needed.