A proper upgrade from your hand, with nothing left to buy: a textured clear stroker, the lube it needs and the cleaner for afterwards.
What's in the kit
Zolo Clear Shot hand stroker: clear, with a ribbed and ridged interior you can see working.
ID Glide water-based lubricant, 1 oz: the right kind for stroker materials, which oil and silicone lubes can damage.
ID Toy Cleaner Mist, 1 oz: spray, rinse and let it dry.
How to use it: a few drops of lube inside the stroker and on yourself, and take your time. It is also a simple stamina trainer: stroke until you are close, stop, let the urge fade and start again. A few rounds of that, a few times a week, teaches you where your point of no return is.
After use, rinse the stroker inside and out with warm water, spray it with the cleaner and let it air dry completely before storing. Ships together in one plain, unmarked box.