Finding the Flavor of Chocolate. Gregory Ziegler puts a small block of chocolate into a styrofoam bowl and sticks it into the microwave. Soon, a lovely sweet aroma spreads through the air, lending warmth to the otherwise bleak lab. Ziegler takes the bowl out of the microwave; it's filled with a thick, swirling liquid.
First Class Large Envelope/Flat Mail. Minimum size: 6 1/8 inches tall or 11 1/2 inches long and 0.007 inches thick. Maximum size: 12 inches tall x 15 inches long and 3/4 inches thick. Maximum weight: Up to 13 oz.
A. Yes. Large envelopes as well as padded mailing bags must be somewhat flexible (not rigid) and uniformly thick. Items mailed in large envelopes cannot have more than a 1/4 inch variance in thickness. Also, mailpieces must be rectangular with a maximum thickness (at the thickest point) of 3/4 inch.