UPS Employees Credit Union is offering a special 6.13% APY 12-month certificate of deposit. The minimum for this rate is $100,000. A yield of 5.40% APY is available for a minimum deposit of $1,000.
Their membership page doesn't go into details regarding membership eligibility. It seems likely that it's restricted to UPS employees and their families. Membership requires a $1 fee and a minimum deposit of $25 into the share savings account.
The credit union is located in Memphis, Tennessee. It's federally insured by the NCUA (Charter # 67608). It has $10.6 million in assets and 2,678 members.