Walmart and Amazon have the Tone Fitness 24" x 68" Yoga Mat, 5mm Thick for just $5.
Walmart:
https://www.walmart.com/ip/Tone-F…k/39201366
Available in both red and blue (teal); free store pick-up or free shipping on $50 orders.
Amazon:
https://www.amazon.com/Tone-Fitne…00_lp_t
Available in red only as an "add on" item – ships with any qualifying order over $25.