You can grab the swag beginning June 1 at 11 am CST at SonicSwagShop.com and “100% of summer merchandise collection sales will be donated to the Sonic Foundation to help spark brighter futures for America’s youth through partnerships with local youth-serving non-profits” according to the company. The new Sonic Strawberry Shortcake Slush Float will be available starting Monday, May 29 for the price of $2.99 for a medium Slush and if you’re a Sonic app user you can get a preview of the new drink now.