I put mine in the plastic recycling and haven't had problems, I also use them to store my gems for crafting But have just realised they may be different to the GlucoNavi ones?
We put them out with the plastic recycling. However, my wife uses them for craft supplies, and I use some to sort and hold pellets for when I'm target shooting.
I use my Contour ones to dump my used strips. and they come useful for keeping my little craft and other bits and pieces. I've also used them occasionally for temporary storage of a few pills pills or wet wipes to keep in my handbag (or pockets) if needs be.
@MrsA2 We had an old thread about re-use, and they've also been used for germinating seeds if I remember rightly.