They’re pouch-maxxing.

Capri Sun — the juicy staple of 1990s school lunches — is dropping its most massive product yet, a giant metallic juice pouch meant to celebrate the last official days of summer. Called the Capri Sun Big Pouch, it’s the largest single item ever made by the drink brand, which celebrates its 58th anniversary this year.

But there’s a twist:

Unlike normal Capri Sun pouches, this one doesn’t have any juice inside it. Fans can buy the $6 metallic pouch, which stands nine inches tall and holds 24 ounces of liquid, starting Monday, Sept. 21 at Walmart.com.

From there, they can fill — and refill — their nostalgic sippy sack with…

Read the full article at NYPOST.COM