PART 1:

What you need:

• 4 cans of soft drinks, preferably tall
• Pleather / leather or rubber if you prefer
• Glue
• Black acrylic paint
• Silver spray paint
• A few plastic shopping bags
• Tape
• thread
• needle

Refrence pictures:



Click to enlarge

First Part, the bag and canisters (click to enlarge):


To start you need to make the oxygen canisters, you need 4 soft drinks cans:


Cut them in half like so:


then put the bottom ends together like so and secure them with tape:


Now spray paint them silver:


While that's drying , time to make the middle pouch, and all i did for this was make it out of pleather and sew it like so:


and then turned it inside out like this to form the pouch

Measurements: 11 x 6 inches, when its sewn and turned inside out it will be 10 x 5 inches

then made the flap part as well and attached it:

Measurements: 5 x 4 inches , one inch will be lost to the rear when you sew it

Then filled the pouch with some plastic bags to give it shape:


Now it's time to make the details:
you need the following pieces:

• PIECE A : Semi Circle to glue onto the flap (4 x 2.5) inches
• PIECE B : one rectangular piece ( 8.5x 2.5 ) inches with four slits made at the bottom part around one inch apart like its shown in the picture
• PIECE C : one lollipop shaped piece (circle is 3.5 inches in diameter and the rectangular part is 2.5 x 1 inch)
• PIECE D : one long rectangular piece ( 8.5 x 1 ) inches
• one cap from any cosmetic bottle, like deodorant or hair spray
• one small square metal loop buckle (Ebay Search)
• PIECE E : the back part (14 x 12) inches

Diagram for these pieces coming soon, so you can just print them straight out and cut them out of your chosen material (pleather / leather / rubber)

This is the deodorant cap cut down to 1 inch in height


Piece C & D connected with the square buckle loop


Then you need a platform on which to assemble your project so i cut this piece out of pleather, it is (14 x 12 inches) and with curves cut on each side, just fold it in half, draw a semi circle and make sure it's not too deep and cut it.


In the picture above you can see the pouch sewn on piece E ,  and the canisters secured on it after being painted black and had detail added on with black tape.

In the picture below you can see the piece A on top of the flap, then piece C and D are connected together (with the square buckle loop) with piece D going in and out of the slits in piece B then the deodorant cap painted and glued on top of piece C


 

Part 2:
So now I have to make the front strap part, I needed to measure around my upper body, after my neck but before my chest.
This diagram shows the pieces i made and sewed together to make it up.
Click to enlarge

The diagram above will correspond to the images below: (click to enlarge)



as you can see here i added these little bottle lids i found and painted them black then added a buckle for the middle as seen below:


And you're done!!