3-d printing would solve a lot of cost.
That’s how emails work, isn’t it? 
Does for me! My ISP is called “Toob”. 
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When I was working for the NHS, I had treatment for a pulled nerve in my right arm ( on the job injury) As part of the treatment, they said they’d send a sort of sling / strapping to me on the ward. A week and a half later it still hadn’t arrived so after a phone call, they sent it out again. This one arrived the next morning. About a week later another one arrived via Royal Mail. ( this was the original one they said was sent via internal mail ) 
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Today yes, but a similar system was in mind.
Those tube systems suck…
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I heard about a Tesco / Sainsburys store somewhere that had a tube system so at various times, notes from the tills were put into a tube container and sent to the store office. The tube system happened to be routed through the suspended ceiling and was routed above the customer toilets. Some bright wag removed a ceiling tile and cut into the tube and got away with thousands of pounds.
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The main Royal Mail sorting office in Cardiff, where I worked for some time in the 80s and 90s, had a similar system for cleaning; the cleaners simply attached vacuum cleaner hoses to the pipes and cleaned the floors, and much else including the interiors of machines, with them. The dirt was collected in a central chamber in the basement which was emptied about once a week. The system was almost silent in operation.
Important to keep the dust down in a mail sorting office, as paper dust is a major fire hazard and can be explosive, with accumulations of it being prone to spontaneous combustion. Because of this, the air-conditioning was never run at more than it’s lowest setting, and with a corrugated steel roof the place was like an oven on hot sunny days. Iced orange juice would be wheeled around on trolleys by managers to keep us going…
There was also a massive, industrial sized, washing machine for the mailbags. Despite this, during hot weather and over the xmas rush, the bags were home to bag fleas, which would attack your ankles and get into your socks and uniform trousers. RM were in the process of replacing the traditional jute bags manufactured in prisons with a more modern nylon version that was alledged to wear better and weigh less; these got just as filthy, though were less flea-ridden but would build up static charge and give you a hefty jolt if you weren’t looking out for it and any part of you or your clothing was anywhere near anything metal!
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Can we keep things on topic, please. 
Mea Culpa, apologies…
Slightly off topic but it’s relevant to the thread and quite fascinating to be fair.