Neo-Angle shower to create a Voice Over booth in bedroom?

Hello -
does anyone know if using a neo-angle shower (those smaller corner showers) because they are self contained and small - would work well if put in the corner of my bedroom and the inside lined with acoustic pyramid foam as a voice over booth? 
 
Would a glass or plastic one be better? 
 
I'm asking as I have no real closets, and I'm using a small box type thing with acoustic foam but it's not always good at isolating sound. I thought if I bough a shower, covered the top with material, and the bottom with carpet, and covered the inside with acoustic foam except for a few spaces to let light in, like a window, I might have decent sound booth. The doors usually have a magnetic lock and contain water, so I thought they might be good at containing sound and are angled, not square. And the building wouldn't be very difficult as it's already made, and I'd just add a top and foam. Cost would be under $1000, instead of $4000 and up for a vocal booth etc. 
 
I'm clearly not a builder, and I would appreciate any thoughts. Especially if this is a terrible idea :) 
 
Thanks!
Erika
 

There are things made specifically for this and they're already fixed to sound good.
Don't know what they're called but googling portable vocal booth might get you started.

I've sadly sold it since my my boys moved out (grown, yay, married, one grandson!) Then I had the second spare bedroom also to record, with my DAW down the hall cabled to a microphone set up.

Here's the breakdown.. using all 2" PVC, like lawn furniture.. build a three sided tall frame... here's the key.. inserted in each of the two front outer posts, almost at the top, put at least one T fitting on-line but Don't glue any outputs. This creates movable arms.

Then cut and put an "arm" of three feet or more (another 2" diameter section of PVC pipe) insert but don't glue, in the perpendicular output of the Ts, and that arm will hold any folded over heavy fabric draped to the floor. Also hang fabric over the frame.

The left and right "arms" now swing fully left and right, more open, or closed, giving adjustable size of "enclosure", and one can try different types of material from what's on hand, to hang on the arms, or purchase over stocks of heavy fabrics cheaply.

I put additional T fittings for more arms, on all four posts so I had complete control over configuration. And two more Ts lower in the front posts, and different "arm" lengths. Lastly, ensure to place the frame on a rug or carpet when using. The "quietness" was better than expected and worked well.

Now you have control over the entire "booth". The PVC frame also gave me mounting surfaces.

Hope this helps!

The foam might help soften the blows when you slip in the shower, but... and maybe I'm over thinking this... wouldn't the foam get soggy and mildewy when taking a shower?!
 
Just kidding.