If you’re faced with writing about a trademarked product, you’d be wise to do a teeny bit of research to ensure you spell the product’s name correctly. You don’t want to look like the writers at Yahoo! Shine, who really don’t care that Pop-Tarts is a trademark:
The folks who write for yahoo.com tried to come up with the correct spelling,but fell one hyphen short:
If you can’t be bothered to Google the product name or you don’t want to use the trademark Pop-Tarts, call ’em “toaster pastries.” Or just make up a spelling and capitalization. It’s not like anyone reads this stuff any way.