A mobius strip with your own text and either 1 or 3 twists, sized with just over a 3cm inner diameter, perfect for a napkin ring. This would be terrific as decor at a wedding, doubling as a wedding favor for the guests. Also makes a great personalized ornament. Your text will be repeated as many times as it will, with a margin of ~5mm, or can be spaced to fit as needed. (See my mobius text bangle for a larger ring.)
NOTE: This item is possibly not printable in stainless steel, and the text lettering is somewhat less than the 1mm level of detail given for stainless steel. The wall thicknesses may also be too thin for alumide.