I saw a bag similar to this one on Travelpro's website but thought the colors were boring so I looked and of course Amazon had several similar. What I like is it's efficient narrow rectangular shape that then opens very wide so you don't need to dig to find things. It comes in 4 colors for $16. I think it will fit in my luggage very efficiently.
Toiletry bag are like counter space - however much you have you'll fill it - so I try to take as small a bag as I can. After several trips I've almost perfected taking exactly as much as I need using the smallest refillable containers I can.