These are the sketches I started off with:

This idea was too ambitious^

Went along with the sarong bag idea.

The last sketch was my last idea I went along with, because it was simple.

For the mock up I used cloth, metal rings, foam and twine.

Since the cloth is too small, I sewed 2 cloths together.

Also I didn’t want my cat to totally drown and flop in the cloth so I wanted a different, harder(but still soft) material as the base. I used foam and cut it into an oval. and placed it in the middle of the cloth.

I folded two ends of the cloth inward, then it down along with the foam.

So moving on to the handle, I used twine. I pleated the twine using a ‘friendship’ band method(I forgot the name of the braid).

But I didn’t like how it was ’roundish’. I wanted a flatter braid so that it really looked like bag straps. I searched up on youtube and tried another braid called Square Knots/Cobra Stitch.

After which I sewed the metal rings to the bag and tied the strap to the metal rings:

Trying out on my cat:

Btw, my cat fell off on her butt 3 seconds later because she slid off backwards so I think one thing to improve on my bag is to have a butt rest or sew the back of the bag. lol