Alternatively, they could simply be there to represent the white model of the iPhone 5C. There has been no evidence to suggest that Apple is launching a black version of the device.
If you want to take things even further, you could even go as far as to say that the circles spell out 5S if reversed, as shown in the picture below.
Thanks to @MikeSel and @MichaelSteeber for that one.
Apple's Tuesday 10 September media event will take place at the Town Hall in Apple HQ, Cupertino. It starts at 10am local time, which translates to 6pm UK time. Follow the event on macworld.co.uk, where we'll be live-blogging the announcements and providing expert analysis of all the big news and launches.
We'll update this article with even more speculation as we continue to decode the invitation right up until the event itself. If you have any further ideas about what the invitation's caption and design could mean, get in touch by leaving a comment in the comments section below, telling us on Facebook or tweeting us.
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