Quart Bags Market Report: Sales Volume, Market Share, Leading Brands & Market Trends

Amazon Basics is the best-performing quart bags brand in July 2026, moving 420,000 units across 6 ASINs for 80.8% of Top 10 volume. Ziploc follows with 80,000 units (15.4%), ahead of 365 by Whole Foods Market on 20,000 units (3.8%).

With 3 brands splitting the Top 10 and 100.0% of volume sitting with three of them, this is a concentrated shelf — the leaders hold multiple listings or one very high-velocity ASIN, so a new entrant competes against established review moats rather than an open field. Average selling prices among the leaders run from $3.79 to $8.07, which frames the price band a competing listing has to justify.

Based on July 2026 data, this shortlist surfaces the two kinds of ASIN worth keeping an eye on — the ones that just broke into the Top 10, and the ones growing fastest month over month. Specifically, one ASIN forced its way in: B074H73J1Q booked 20K units at $3.79, with ▲ 100.0% MoM change. On the growth side, B00099XKRW leads positive momentum with ▲ 233.3% MoM growth on 1K units, with B0FH1CZRJ9 close behind at ▲ 100.0% MoM on 2K units.

The two signals carry different weight. A fresh entrant means share has already changed hands — an incumbent gave up its place to make room, so any competitive set drawn up a month ago is now out of date. A steep growth rate works as the earlier warning: it marks demand that is still compounding, usually a month or two before the ranking catches up to it.