Tanga continues to offer the OxGord LED Pet Collar in seven colors (Green pictured) for free plus $4.99 for shipping. That's tied with our mention from last week and the lowest total price we could find by $4, outside the offer below. It features four modes, a metal leash clip, and two CR2032 batteries (installed). It's available in sizes S to XL.
Of note, Won Lane via Amazon offers it in Red in size Small for $4.77 with free shipping via Prime.