Meritline offers the EF 24-70mm 1:2.8 Lens Coffee Mug
with free shipping
. That's tied with our mention from two weeks ago and, outside of the price below, the lowest total price we could find for a similar mug by $4. Based on the Canon EF 24-70mm 1:2.8L USM lens (but branded "Caniam"), it features a stainless steel interior, food-grade plastic, and lens-cap lid.
Expect this item to take two to three weeks to arrive.
A close price: N&J's via Amazon has it for its Prime members for $12.31 with free shipping.