Popped in to Asda and Ikea today. Picked up a couple of bowls shown above, got another in IKEA and compared them with the one I've using. Bear in mind that I have ordered a Dirty Bird double size scuttle and a small lather/soap bowl.
From left to right we have two bowls from IKEA (£1.99 and £1.49) An Asda mug (£2 in Southampton) and mine (20p Lymington junk shop) The Dirty Birds were £75 including shipping. Will review them when they arrive.
Measurements, left to right are width of inside of bowl at top in inches: 6. 5.5, 4, 4.5. Height: 3, 2.25. 3. 2.25.
It's all down to personal preference. I don't like the shape of my bowl. It's a bit of a right angle at the bottom and I always feel I'm hitting the sides.
The Ikea on the left is simply too big for me. The nice rounded shape is a pleasure to use and I don't hit the side of the bowl with the brush which I find irritating.
The Asda mug doesn't work for me. I find it too small and the depth and shape means I'm always knocking the brush against the sides.
The other Ikea is really good to use. The shape works well. It's not too deep and there is no need to keep hitting the sides.
None of this takes account of the possibility of producing warm lather. I suppose any of the bowls could be stood in a bowl of hot water.
That's where the Dirty Bird scuttle comes in. Used in the right way it keeps the lather warm which is claimed by some to be a real pleasure. I don't yet know if II will find the scuttle comfortable to use bearing in mind its size and shape. I will post a review when it turns up. Meanwhile, as from tomorrow, it's an Ikea at £1.49 for me.
Strikes me that like just about everything else we talk about here its down to personal preferences depending on all our quirky likes and dislikes. Like life in general I suppose.