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.
For simple mailings, there are several envelopes that have the stamp already on them. Senders can choose what size envelope fits their needs. The sizes vary from #6 Â¾, #9, #10, or even a postcard. They can be solid white or they can have a clear window so that a mailing address on a letter can be seen through it.