Walmart offers this Bamboo Expandable Kitchen Cabinet Pull-Out Shelf for $29.99. Opt for in-store pickup to dodge the $4.97 shipping fee. (Amazon charges the same with free shipping via Prime.) That's tied with our mention from two weeks ago as the lowest price we've seen. (It's the bet deal by $15.) It holds up to 50 lbs. and expands from 11.5" to 17".