2026 Topps Series 1 Baseball Celebration Mega Box

This set replaces the Opening Day series and I like this way more than that set. The mascot cards are great and I pulled some really good parallels, including a numbered mascot auto!! I hope Topps continues to bring this back every season.

I loved opening these things! Lots of good hits too! Just wish the supply didn’t dry up so fast! Recently got these with some bowman value boxes. Definitely a super fun combo to rip!

Great product year after year..topps is always top shelf

These is a must buy, the cards and inserts are very nice , the card quality is great , the insert variety is crazy, I will definitely purchase another box I highly recommend it to everyone

I grabbed the 2026 Topps Series 1 Baseball Celebration Mega Box from Best Buy and came away really impressed. If you’re a fan of flagship Topps products, this one delivers exactly what you’re hoping for—with a little extra excitement mixed in. The Celebration Mega Box adds a nice twist to the standard Series 1 release. You still get that classic Topps look and feel, but with exclusive inserts and parallels that make it feel like more than just another retail box. What I liked most: Strong rookie class – plenty of chances to pull key rookie cards that actually have value. Clean, classic design – Topps keeps it simple, and it works. Cards look great for collecting or grading. Exclusive Celebration content – the added parallels and inserts give this box its own identity. Good overall value – lots of packs to open, making it a really enjoyable rip session. I didn’t hit a massive card, but I still pulled a handful of rookies and shiny parallels that made it worthwhile. This is the kind of box that’s just fun to open, whether you’re a collector, set builder, or someone looking for cards to flip. If you enjoy Topps flagship and want a retail box that offers both nostalgia and upside, this Celebration Mega Box is an easy recommendation. I’ll definitely be picking up another one.