This is a bowl designed for giving your dog water when you take them with you to the park, or to the trails. The opening of the bowl is narrower than the base, so the pressure of the water in the bowl holds the bowl upright. You can fold it up and put it into your pocket when you are not using it.

You could go buy a foldable (and prettier) portable dog water bowl for $10-$15 or you could make one in less than 30 minutes and do some recycling too.

Step 1: Materials and Tools

You need the following materials:
Flexible Plastic Sheet at least 28cm x 28cm
Aluminum foil
Piece of scrap wood

I am using some housewrap that I got from the throwaway pile at at local construction site. It feels like fabric; is light, watertight, and strong. It is used in the same way that Tyvek is. (I do not know if Tyvek would work for this project).

And the following tools:
Soldering Iron

Step 2: Measure, Mark, and Prefold

1. Measure out a 28cm square on your sheet of plastic. and mark the outline.
2. Make a mark 7cm and 8.5cm from each corner. (these marks will be your folding guides)
3. Cut out the square.
4. Use a straight edge as a guid to make a fold. Use the marks that are closest to the corner, and fold inward. Make this fold on all 4 sides.

Step 3: Plastic Welding

Do this outside, unless you like toxic fumes.

1. Heat the soldering iron
2. Place aluminum foil over the area to be welded together.
3. Move the iron over the area where you wish to make your joint, melting the pieces together.

I use the clamp to hold my piece of scrap wood which is my welding surface.

Practice on some scrap pieces. Use the flat side of your soldering tip. Also fold the Foil in half in order to minimize the chance of fouling the soldering iron with melted plastic.

That is the basic technique. Now we start by tacking corners.

Step 4: Folding and Welding One.

1. Pinch the edges together, matching the 8.5cm (inner) marks.
2. Quickly use the soldering iron to make a small tack weld at the mark

It is very important to match up the inner marks. It creates the inward lean that the bowl has, so that water pressing against the walls will make the bowl stand up.

Step 5: Folding and Welding Two.

1. Fold the excess material in the corner to make a diamond shape.
2. Fold the top of the diamond down underneath the rest of the corner into the little pocket that was created. (do not fold it into the bowl.)
3. Place your aluminum foil over top, and weld it, making sure that the corners are tacked down.
4. Repeat for each corner.

You have finished making the bowl. You might want to wet test for leaks.

Step 6: Usage

Put about one inch of water into the bowl. If you put too much water in, it makes it hard to pick up the bowl to drain it with only one hand.

Fold the bowl in half twice to pack it up. Unfold and fill with your dog's favorite beverage when ready. I hope you enjoy your dog bowl.
This is great, i'll have to make one for my girlfriend's dog. i make little stuff-sacks out of the tyvek mailing envelopes our paychecks come in, i'll post an instructable friday. im sure tyvek would work, as its used as housewrap and is watertight. oh, and grats about the newsweek thing!
Hey post a link to the tyvek stuff sack instructable when you make it. I am glad you like this.
Why am I a collaborator to this instructables?
awesome!!!!!!!!!<br/><br/><sub>5/5 and fave</sub><br/>
Hey. Did you know that you were in June 16th issue of Newsweek! It's on page 53 under the pets column! Congrats!
Wow, that is pretty neat. I am surprised. Thanks a bunch for letting me know.
Yeah. I was excited to see instructables in the press again. I bet you get a whole bunch of traffic to this instructable now. Newsweek has loads of readers.
You know I never expected this instructable to get any attention. This is neat. +1 for recycling/dumpster diving.
This is so cool!!!
Nice work. Also, this has more potential uses than watering dogs. L
Thanks for the feedback guys. The bowl is holding up well. The dog loves it. @ Graham, thanks for the baking sheet tip. Don't have any now though.
Nice project. Silicon baking sheet is also good for forming welds through and it never sticks.
This is a 'classic' project, and makes a great instructable! You can actually boil water in a paper bowl similar to this...

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