BlackWing1977
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My stainless steel 555 metal mug with lid also used for many many years.. until got permanent brown coffee stain liao.. including the spoon I used for it. 
Like what someone said in this thread, might not even be the steel, it might be the plastic parts.i've been using cheap TYESO tumbler for daily coffee, safe anot?
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Stainless coating?? Simi lai eh... I though stainless steel through and through is the same material?Wah wash every day then the stainless coating will thinner faster or not.
Then the shelve life shorten 50% very fast worh.
WLWL.
Plastic bottle also not safe
Time to use banana leaf
So the lead is an actual piece of lead at the bottom to keep it stable ar??
Like what someone said in this thread, might not even be the steel, it might be the plastic parts.
So the lead is an actual piece of lead at the bottom to keep it stable ar??![]()
10÷5=2tmd i have 5 , then how![]()
This is first world worry. Watch the youtube video on indonesia plastic fuel fried tofu or southeast asia plastic melted in cooking oil for crisper deep fried food.I also find it scary that some people use plastic Tupperware put into microwave
Even though the label say microwave safe,
I still find glass Tupperware is safer.
That’s their own lives and their daiji.This is first world worry. Watch the youtube video on indonesia plastic fuel fried tofu or southeast asia plastic melted in cooking oil for crisper deep fried food.
Read an article that china consumer group tested stainless bottle. Need to boil 5% concentration acid for 30 minutes then left inside the bottle for 24 hours then the leached metal exceeded safe limit.Coffee is also acidic.
For old people in the article they not likely to drink fruit juice
But more likely coffee
yeah, but it is a 1 time 24hours test with concentrated acid mah.Read an article that china consumer group tested stainless bottle. Need to boil 5% concentration acid for 30 minutes then left inside the bottle for 24 hours then the leached metal exceeded safe limit.
Most vinegar sold in supermarket is about 5-6% concentrate. Most people cannot drink this concentration directly, will chemical burn mouth and throat lining with just one sip. So unless the acidic drinks beverage is as acidity as vinegar, is safe to keep inside stainless steel vacuum flask for few hours.
Stainless steel will form new protective chromium oxide layer instantly when the existing provective layer is removed.yeah, but it is a 1 time 24hours test with concentrated acid mah.
we are talking about years of using the SS bottle to store light acidic drinks like coffee/ fruit juice.
thats why to play safe, buy reputable brands and change bottle every couple of years
Stainless steel has simi protective layer??Stainless steel will form new protective chromium oxide layer instantly when the existing provective layer is removed.
Throwtmd i have 5 , then how![]()
almost all electric kettle to boil water is made with SS. safe bo?
jialat, been using the same electric kettle for years already