Please do remember. A glass jar is inert. No chemical will be able to react to it under normal and extreme conditions – unless the glass itself is melted. Glass can be reused a hundred times, thousands times and to infinity as long as it is whole and sound. A bottle cap is disposable though. A new one should be provided every processing session. So every glass jar is considered capless after consuming the package content.
Decent and crazy ways to cap it again.
1) Buy a new screw cap. It’s the best thing to do. Contact a trusted supplier and procure new sterile caps. A must if the package food is for commercial sale.
Every cap has a rubber seal underneath. It makes contact with the jar lid making and airtight and watertight closure. Reusing is not practiced because 1) the pressure between the jar lid and metal might have damage the rubber seal and 2) the food components might have migrated to rubber seal, it might ruin the next food content.
Next items are recommended only for home use…
2) Reuse/Recycle. Just recycle the cap together with the glass bottle. Wash both thoroughly and dry before using. Make sure the cap has no indelible stain, rust and foul odor. Check for leaks by capping and inverting the bottle. Discard if leaking.
3) From other used jar. Same as previous item but get the cap from other jar of the same mouth type. Do if the provided cap does not fit for reuse.
4) Rubber band and plastic. The last resort. Fit a clean plastic bag around the jar mouth and secure with a rubber band. For strict home use only, should not be use for resale.
This short piece of glass is of great help. It always help us in monitoring temperatures. Temperatures of oven, water, juice, jellies, refrigerator, freezer, air and even body temperature. However, there are other types that do the same function without much risks.
1) Using glass thermometer is indeed risky. Glass is fragile. Handle it with care to prevent breakage. But accidents do happen and cannot be always avoided. Broken glasses might hurt own’s hand, feet if left scattered on floor…
What are you going to do if broken glasses fall in prepared juice? Simple filtering can remove larger pieces but not minute shrapnels that can cause mouth and internal organ wounds when swallowed. Glass is an inert material and no stomach acid can degrade it.
2) DOH Administrative Order 2008-0221 – ban of mercury based thermometers starting September 28, 2010. Many hospitals have implemented the ban long before the indicated date. Dangerous mercury is the reason. Mercury in any form is toxic. It enters the body through swallowing, inhalation and absorption to skin and mucous membranes. Imagine a piece of mercury in hand separated by a thin piece of glass. Scary! Never sure if the order was also effective on food industry.
If the piece of mercury based thermometer is broken and fell to food, then the food should be dispose immediately. Removing mercury and broken glass pieces is not possible.
3) It is hard to read. I have been using this type of thermometer since elementary grade. I always find it hard to read, finding a fine line along a sealed glass tubing.
Switch to dial type or digital thermometer with a stainless steel tip.
A glass should be held firmly in between fingers or else, the chance of drop will increase. The rule is engraved in our brain. Holding it firmly is the normal instinct. We are aware that falling will cause breakage and spillage of contents. Sometimes, falling cannot be prevented, the glass breaks and the contents are wasted.
1) Hand injury. The hand is wounded or suffering from arthritis. Holding it firmly is hard when the hand is in pain.
2) Too young or too old. Toddlers find it hard to hold a glass or any other object firmly. The thing might be too heavy or the hands are not strong enough. The same principle applies to old generations.
3) Holding it with slippery hands – soapy or oily. Drop incident is very likely.
4) Someone in a hurry causes breakage of kitchenwares such as plates and glass. This is often the cause.
This glass is slip proof. The brim is protruding sidewards. It was designed to cling to fingers in case of accidental slippage.
KFC Fast Food Restaurant is using this kind of glass. It is not only slip proof, it is also break resistant. It is a plastic glass.
Most of the disposable drinking cups have this design. Made of soft plastic material so holding it firmly is not possible. The protruding brim prevents the accidental drop.
This thing always happen to me before. A cracking glass with water. To make it clear, its a cracking glass with a recently boiled water. A cracking sound was heard just before the water pouring was finished. A non-straight line was then seen on glass side. In some instances, the glass broke completely and the hot water spilled.
Mother thought me great solution for this. Place a metal spoon in glass before pouring hot water. When pouring to several glasses, each one should have its own metal spoon. This works for me every time.
Why glass breaks when poured with very hot water? Glass is brittle and it cannot resist a sudden rise in temperature. It cracks a result. The same is true with the sudden temperature drop.
Metal spoon is a good heat conductor. It absorbs heat from just boiled liquid, lowers its temperature and prevents cracking. Using the same spoon for consecutive glasses is not a good idea. It already absorbed the heat of the first container and will not be effective in the next.
There are other tricks. Let the hot water stand for five to ten minutes before pouring. This will lower the water temperature. Or use a more resistant medium, a ceramic coffee mug.