Amazon offers the High Sierra Loop Daypack Backpack in Midnight Blue/Black/Lime, Lime Fire/Black, or Island Ikat/Navy for $24.32 with free shipping for Prime members. (Several other colors are within $3 more.) Outside of the mentions below, that's the lowest price we could find by $6, although we saw it for $2 less a year ago. It has a tablet sleeve, beverage holder, and padded airmesh shoulder straps.

Close prices: Dick's Sporting Goods has it for $26.99 with free shipping. Coupon code "BTS" drops it to $27.99 at Macy's, with free shipping via padding with a beauty item.