A cleverly compact beach umbrella table with a secret! Designed to maximize your 3D printer's standard 21x21 cm area, this square tray with rounded corners functions as both a tabletop and a hidden storage compartment.

Simply lift the top through its discreet finger hole to reveal a safe, sand-proof space for your phone, keys, or wallet. Once closed, the upper surface works as a stable mini-table with a raised edge to hold your drinks, snacks, or sunscreen.

To install, slide the central hole over the top umbrella pole (up to 19–20 mm Ø), and once the umbrella is assembled, the locking mechanism between poles keeps the tray firmly in place.

Compact, secure, and perfect for beach days!

How to Print: Parts: Print the tray and lid separately. Orientation: Both parts flat on the bed. Supports: None needed. Layer height: 0.2 mm or higher. Infill: 15–20% for light but sturdy results. Material: PLA or PETG recommended for outdoor durability.