We have found the best tumblers for under $9!!!! I think they work just as well as YETI for a fraction of the price. (commissioned links)

Shop here — https://rstyle.me/+Hz7JrfSJ_tKocylD-liWFw
More sizes here — https://rstyle.me/+Md-DaWwQOd89NVyRX1jwjA