The best thing about single-serve Pringles Snack Stacks potato crisps is that they’re a perfect fit for school lunchboxes. Snack Stacks are the one thing you can pack for school lunch that you know won’t get traded! Send the kids off with Pringles Snack Stacks Original and you can be sure every last crisp gets crunched.The best thing about single-serve Pringles Snack Stacks potato crisps is that they’re a perfect fit for school lunchboxes. Snack Stacks are the one thing you can pack for school lunch that you know won’t get traded! Send the kids off with Pringles Snack Stacks Original and you can be sure every last crisp gets crunched.