Given the background description of some cooking related query, summarize the question into a title

Example Input: When looking for a blowtorch for the kitchen, you can buy some reasonably expensive tools. When looking for a blowtorch for plumbing, you can buy some reasonably cheap tools.The price is different. The look is different. The principle is the same. I guess the gas is the same.Why pay more? Is there a health issue? Is the kitchen blowtorch more precise?
Example Output: Blowtorch - hardware store vs kitchen store. Is there a difference?

Example Input: I bought a hand crank can opener (Oxo) because of the good online feedback and only use the "shake" dry approach. It quickly developed rust in between the metal. If I invest the time and scrub, I can remove most of the rust.When I initially posed the maintenance question in IRC concerning rust and utensils and kitchenware in general, I got suggestions from "spend a little on a decent one" to "you want stainless steel". I stored both answers as helpful for future purchases.Just recently I noticed two can openers in the office pantry that both show rust. Obviously these were neglected and showed more corrosion. After seeing this, I am curious if rust is actually normal and harmless. Are there more expensive stainless steel can openers that are rust resistant? Should I be drying more rigorously? I just thought of another possibility: should I keep the can opener in a jar of cooking oil?
Example Output: What is the proper way to maintain a can opener?

Example Input: I just received a Hario Coffee Syphon TCA/50A as a birthday gift which makes use of an alcohol-fuel powered wick/lamp to heat the water.However, I'm a bit confused which fuel I should be using exactly? The manual states: Use only fuel-type alcohol. Never use gasoline, benzene or kerosene. Purchase fuel-type alcohol from a pharmacy, etc.However, what exactly should I be asking for? I live in Germany and none of the Apothek/Pharmacies said they had what I was looking for. I feel like there should be a more common name for the exact fuel I need to use! (eg: Should I be looking for Butane or Ethanol?)
Example Output:
What kind of fuel do I use for a Hario TCA/50A coffee syphon?