The Deluxe Summer Upgrade bundle includes all of the following:

• 6 Summer Crate Keys
• Rainbow Armor Cosmetic
  • https://i.gyazo.com/f6e58aa4174016e53c9ee4fa679c0ad9.gif
• Exclusive Tags (Blazing and Popsicle)
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• Exclusive "Icecream" taunt
  • https://i.gyazo.com/7657e6d7b5c3d674de59bc4665345885.gif
• Perry the Platypus Pet
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• Trails (Magic Crit and Dragon Breath)
  • https://i.gyazo.com/3b77bc037a892b05332ff6bca8845b37.gif
  • https://i.gyazo.com/e97b8c744b5599b353a53d0d17015de7.gif
• Sell Shard (800 uses)
• 30% personal sell booster x1
• 7,500 Claim Blocks

This is an upgrade for those who purchased the normal Summer Bundle but want to upgrade to the Deluxe version.