Giada Ergonomic Furniture via Walmart has Perlesmith Adjustable Height/Tilt Angle Folding Tray Table w/ Cupholder (Black) on sale for $45.99 – $26 when you click on the coupon via the product page = $19.99. Shipping is free.

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Product Details:

• 6 Height Levels: height can be freely adjusted from 20.4″ to 28″.
• 3 Tilt Angles: angle can be adjusted from 30 degrees upward, to a horizontal angle, and 20 degrees downward.
• Foldable Design.