OIL and ACRYLIC PALETTE in a box

I dedicated the entire month of May to do a Value chart of the oil colors that I use most often and after finishing that one I did a similar one for Acrylic. I encountered a big hurdle while mixing the paint, soon I found out that if I left the paint a long time on the palette it would dry and the next day had to replenish with fresh paint out of the tube, it really was a waist of money and precious time. There has to be a better way to do this? I asked myself, and then it clicked on me what our Master teacher, JOHANNES VLOOTHUIS, said many times over his Landscape Painting Course: "I put oil paint in an acrylic palette with a cover and put it in the freezer to preserve the medium for several weeks". WOW! my architectural brain got into action and began designing a box with a lid and came out so successful that I made a second one to use with Acrylic.
PALETTE BOX:
I already had two wooden boxes that contained pastel sticks so all I needed to do was to make a lid out of 1/8" thick finished plywood used for furniture making, I removed a non-glare glass from the frame of a watercolor painting hanging on the wall and cut it to fit inside the box, I already had the glass cutter. The box measures are: 10"x14"x 1" high and 1/4 " thick , I painted it in grey, then I put a grey sheet of Canson paper and the glass on top. I glued a 1/4" wide strip of "felt" all around  the edge of the lid to make it airtight, then I applied a 1"- wide "Velcro" strip on each side to close it tightly. You may find a similar box in a Craft store or buy the materials at Home Depot and make it yourself, do not use nails unless they are very tiny finishing nails, I would prefer to use carpenter's glue instead. I am sure that you can do it, but if you need any further info. e-mail me.
I am showing here pictures illustrating how to proceed: Picture 1; shows the box after it was painted. Pictue 2; shows how to cut the glass. Picture 3; Placing the glass inside. Picture 4; Installing the Lid. Picture 5; Box with lid down. Picture 6; Finished and ready for use.