We use liquid detergent and it always seems that there is a certain amount of product left in the bottle that is just to much of a pain to get out, but at the same time it seems like a waste to throw away perfectly good product. This is my solution to, ....ahem... wasted solution.( Sorry, couldn't resist.)

Step 1: Material and Tool List

This is a nice simple project that is made out of scraps that I had in the shop( aka the garage).

Material List:

A few small scraps of 3/4" plywood. ( You could use almost anything that is about 4-6" wide.)
A piece of 1/4" plywood.
A hand full of 1 1/4" drywall screws.
Empty detergent bottle.
Cheap funnel.

Tool List:

Table saw
Miter saw
Drill
Hole saw
Pocket screw jig
Tape
1/8" drill bit(Not shown)

Step 2: Sizing Unit

Picture 1

Sizing the bracket will depend upon the bottles you actual bottles that you buy. We tend to buy the smaller size bottles so this one ended up at 4". I made it a little bit larger than the bottle for ease of use.

Picture 2

I then set the table saw to the proper width and cut all of the pieces to the same width. All of the pieces are not cut to length yet.

Picture 3

To figure the length I again laid the bottle along side the upright back piece, held the funnel where I thought it should be, and marked it with a pencil. I did cut this piece log to give me some latitude and to get rid of a lot of the excess, which was used for the funnel holder.

Step 3: Pocket Screws

Picture 1

I used a pocket screw jig to attach the pieces. I had it on hand so I used it. You could just as easily drill through the bottom and screw it together that way.

Picture 2

This shows how the pocket screws work. (I love these things. The jig didn't cost to much, and it last a long time. I've had this one for about 10 years.) The screws are special screws made for pocket holes, but drywall screws can be used.

Step 4: Placing the Funnel Holder

Picture 1

Hook the funnel onto the back piece to check the height and the relationship of the funnel to the bottle. I wanted the end of the funnel to be in the bottle to eliminate drips. Mark the location. You also mark the center of the funnel neck where it will go through the funnel holder, and where to cut off the excess.

Picture 2

Cut off the excess. Square the line that you marked for the neck, and find the center.

Picture 3&4

Now clamp the piece to something solid and make the hole for the funnel neck with the 2" hole saw. If you stop when the guide bit penetrates the back side and turn the piece over to finish the hole, you will eliminate a lot of the splintering from the hole saw.

Picture 5

Attach the funnel holder to the back upright on the squared mark the you made when you were placing it in Picture 1 in the same manner as the bottom.

Step 5: Reinforce Corners

Pictures 1&2

Although the unit is fairly strong as is, a function of the pocket screws, I decided to add some small gussets made of 1/4" plywood, to reinforce the corners. They are drilled and then attached with the same pocket screws that are used for the rest of the project.

Step 6: Sand and Paint If You Want

Picture 1

Sand smooth

Picture 2

Ease corners at the same time to eliminate splinters and to protect edges.

Picture 3

Finished unit in use. I haven't decided whether or not to paint it yet.