Description
Collectors will feel like they’re partying when opening 2026 Topps Series 1 Celebration mega boxes.
Between the Confetti parallels and mascots making character appearances, Celebration mega boxes help make the unofficial start to baseball season a little more fun.
Boxes include the chance to find exclusive parallels and inserts, and mascot autographs and relics.
2026 Topps Series 1 Baseball Celebration Mega Box Checklist Overview
The Celebration mega boxes are an overlap of 2026 Topps Series 1, but collectors can find several concepts in these boxes that aren’t available anywhere else mixed in with concepts that have been inserted across other formats.
Confetti parallels are one of the most notable exclusives. Found in regular Confetti, as well as Pink and Lime Green, collectors should land several of these in every box.
Topps also pays tribute to the long-running Opening Day brand, which was an annual staple from 1998 to 2022 that targeted younger collectors and often included similar content as the Celebration mega boxes.
The Opening Day Foil parallel includes a repeating pattern of the MLB Opening Day logo running across the cards and land once per box.
Also making a return exclusively to Celebration boxes are mascots.
Topps has a lengthy history of producing mascot cards, mostly in the Opening Day line, and collectors can collect all the mascots that make them laugh or do a face palm through a comprehensive insert.
Speaking of mascots, they also have some of the rarest cards in the product.
Mascot Dynasty Autographed Patches make their return to Celebration boxes, giving collectors a prime piece of mascot-worn memorabilia and an autograph.
Exclusive variations include Dugout Peeks and Walk This Way.
Dugout Peeks are exactly how they sound — a peek at a player in the dugout, with a pair of cartoon eyes peeking back at you for good measure.
Walk This Way takes a look back at several players who secured walk-off wins throughout the previous season.
Gameday Drip is also making a second straight appearance in Celebration mega boxes, giving collectors a look at some of the styles players have as they enter a stadium.
Additional inserts exclusive to Celebration boxes are 8 Bit Ballers and Perennial All-Stars.
2026 Topps Series 1 Baseball Celebration Mega Box baseball cards at a glance:
Cards per pack: Mega – 14
Packs per box: Mega – 14
Boxes per case: Mega – 20
Set size: 350 cards
Release date (subject to change): March 26, 2026
What to expect in a Celebration mega box:
- Opening Day Foil Parallel – 1
- Confetti Parallels – At Least 7
- Exclusive Inserts/Variations – 28 Total
