Gainz Box July 2019 Theme Spoiler + Coupon! Posted by Hello Subscription on June 18, 2019. Subscription Box Spoilers / Gainz Box Spoilers Hello Subscription may earn compensation via links in this post. Read the full disclosure Save for Later Notification We have the theme spoilers for Gain[z] Box July 2019 subscription box! DEAL: Get $5 off your first box just use the code GZBX5 OR FITLIFE. Valid to new subscribers only. The theme is SUMMER SOLSTICE! Are you getting Gain[z] box this month?