While hunting for bubble bath that didn't cost me an arm and a leg, I remembered Lush in South Park.
Great products, great prices, lots to choose from but customer service is not all that great, i guess, but you can't really expect much. The store's layout is a tight and cramped, so it's hard to move around in.
Other than that, it's a great go too spot for some fun bath products that aren't fussy in price.