For something like bathsoaps I would offer products singularly and in sets. For sets I would offer something like: 3 of 1 scent, 6 of 1 scent, 3 of cordinating products/scents.
For example, if you're selling bath bombs, soaps and candles I would offer an entire bath party set with 1 item from each product offering in cordinating scents (all vanilla, all chocolate, etc). I would also cordinate some of my product offering for difference seasons, like fall would be apple cider, cinnamon apple, vanilla, pumpkin. In that case I would offer sets of bathbombs in all the fall scents, candles in a seperate listing in fall scents, etc. I would also offer a fall basket with an assortment of bathbombs, soaps & such in a cute basket with a fluffy loofa, a bath massager & even an eye mask (these are things you could pick up at Wal-Mart or other Etsy sellers) and offer it all together in one big set for a nice healthy profit. These would make great gifts for people (think Birthday, housewarming, college grads, new college students, Christmas, Get Well, etc)
Additionally, i like to buy things like bath products, makeup & other personal hygene stuff, but I love it when I can buy a 'sample pack' with 3-12 varieties in a smaller size. This way i can try a bunch of scents, colors, etc before commiting too a bigger order. Just some ideas!