Swiss Army Floating Eyeglass Case

From the website:

Enlist the Swiss Army to Protect Your Glasses

Drop this Swiss Army eyeglass case in the water, and it bobs like a cork.

Ballistic nylon and watertight zippers protect one or two pairs of glasses.

From Victorinox.

Weight: 3.5 oz.

In red or black.

$22 here.

Other uses:

• As a float (or bobber, as we used to say in Milwaukee, back when we sat for hours waiting in our little rowboat on Mauthe Lake waiting for a bite) while fishing

• Industrial–look wallet

• Tampon case