As a regular cyclist I can tell you that there are really only two types of cyclist.
Those who check the air pressure before rides and those who ride for miles on low tires blissfully unaware of the extra energy needlessly exerted.
I'm the guy who not only checks my tires, but also those of friends and family.
Over time I've replaced countless tubes. At most shops there is one traditional tube style available for around four to seven dollars. You pick the size you need and go.
Sometimes there are slime tubes or puncture resistant tubes or..heavy duty tubes.
I've tried the slime.. Even Kevlar tires.. etc. For me there was no appreciable advantage to these.. they would still fail from regular use in no time.. flat. 
When I would pick up tubes at Malmort they would always have the big bulky and higher priced "heavy duty" bike tubes. With extra weight being against the logic of cycling I avoided them for years.
After a spate of failed tubes on one particular bike I tried one of the "heavy duty" tubes. I knew I would have to wrestle it a bit to get it on, but it really wasn't that bad.
After filling it and putting it into service it was a long time before I realized the side benefit. Unlike every other tire that I would need to top off the air on a regular basis.. This tire remained firm and pressurized. Was it a fluke I would think? Not really, as I've replaced others with pretty much the same results. As the seasons change I'm continuously amazed at how little attention I've had to give these tubes.
After maybe 5 years of rather astonishing results, I'm almost at the point of replacing tubes on tires that never flat, but do loose air.
SO.. There's a stocking stuffer idea for the person who rides on low tires or the person who fills those tires.. (Lyn)
Not the most exciting gift idea, but better than the dreaded gift cards!!

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