The Holders
Back View
A piece of 1/8" (3mm) thick acrylic was shaped as a base to fit under the box and cup holder on each side. It was bent down at the front to allow it to stand on the dash, keeping the base level.
A piece of acrylic bent into a flat bottomed "U" shape, then inverted to fit into the ashtray was screwed to the bottom of the base piece and box.
Top View.
A metal box from IKEA was trimmed along the top front and sides to make it easier to see into. Two vertical slots were cut into each side.
Two hoops with a flat one one side were cut out of 3/8" (10mm) thick plastic and smoothed with a router.
These were then screwed through the slots in the sides of the metal box to allow the hoops to slide up and down to suit different sizes of cups and bottles.
Two cupped circles were turned out of the 3/8" (10mm) plastic and screwed to the 1/8" (3mm) base. These hold the bottoms of cups and bottles firmly in place.
Junk Tray and Drink Holders
Note the slots in the side of the box to allow the cup holders to slide up or down depending on the height of the cup or bottle.
Another view.
Note how the front of the box has been cut down to allow better access.
(Yes it really is -1.4oC inside the fridge. The other thermometer shows it is 6.6oC outside.)
The Junk Box acts as a holder for:
1. display for an RF remote thermometer sensor in the fridge screwed to the back of the box,
2. a wired remote thermometer sensor for outside temperature mounted with Velcro below the box,
3. a tire gauge clipped behind the front edge of the base,
4. reading glasses case clipped to the front of the box,
5. lots of room inside for the radio/CD remote, pens, notepads, etc.