Now -- Calibrated Klein Bottles!

In response to underwhelming customer demand, Acme is pleased to introduce calibrated Klein Bottles.

You need never doubt the volume of your Klein Bottle, now that Acme provides fully calibrated Klein Bottles. To determine the volume, simply glance at the easy-to-read graduated scale.

Best of all, this calibration service is FREE! With every Klein Bottle, you'll receive a clear-vinyl calibration decal that sticks to your manifold. Just peel away the stiff paper backing, and then carelessly press the clear decal onto your bottle. No adhesive is required, so you can remove the decal during leapyears, should the authorities so require.

Once you apply the decal, we ABSOLUTELY GUARANTEE your Acme Klein Bottle to be CERTIFIED not to be TRACEABLE to the National Institute of Standards and Technology, the National Physical Laboratory, and the International Bureau of Weights & Measures outside of Paris.

If you already own an uncalibrated Klein Bottle, send us e-mail and we'll happily send you a decal for zero cost.

Your Klein Bottle won't dissolve in organic solvents, but the label might. So remove the calibration before visiting a chem lab!

Yet another value-added service from ACME, world leader in the topologically trivial.

	Here's a Big Classic Klein Bottle calibrated with graduation lines.
	A closeup of the calibrations.

Our Top Mouth Erlenmeyer, calibrated and half-filled with green water. Notice how you can easily measure the volume of the Klein Bottle using the meniscus. Also note that the barometric pressure is lower than normal -- the fluid has risen in the side arm.