Hi everyone! I made this sofa tray for my sofa and so I thought id share it. It uses M3 20mm screws to connect the legs to the body. (If you dont have the screws you could potentially print them but its better with actual screws)

It has space for a cup, phone and remotes. You can increase the Cup holders and remote holders! 

Its customizable so you can change the sizes and amounts of holders!

• sofaHandleWidth is the width of your sofa handle where the tray will sit. I would recommend using a couple of mm more than the actual size so you are confident it fits (94 mm worked for my sofa) 
• phoneMaxWidth and phoneMaxLen can be changed for phone size ( I have kept 4mm tolerence in both so its not a tight fit) (If you want a tight fit you can decrease these values by upto 4mm but I wouldnt recommend because it might get too tight (170 and 13 are default) (Fits phones 174 and 16mm)
• tableWidth and tableLen can be used to change the size of the table (W124 and L250 mm default)
• legsLen can be used to make legs longer or shorter (100mm default)
• canDiameter can be used to increase Diameter of the cup/can (Max 100mm. more if phone is small)
• canholder can be used to increase can/cup holders (Max 2 to 3 depending on size)
• remoteMaxWidth and remoteMaxLen can be changed for remote size
• numberOfRemotes used to increase holders (max 4 depending on size)
• wallHeight can be used to make walls longer (30mm is default)

Original version

Cup max Diameter = 85mm

Phone (Sits sideways): 

Phone max length = 172

Phone max width = 16

Remote (Stands Straight):

Remote Len: 45

Remote width: 19.5

Fusion360 file available