Mary-Anne, we have been using bamboo chopsticks, the same ones, for at least 20 to 30 years....they aint worn out, they aint mouldy(we are the only mouldy ones)and as long as they are treated properly, as we do, by washing them separately, in hot soapy water, and then rinsing in boiling water, they will last forever, at least ours have...a Chinese restaurant owner friend of mine in Kelowna BC showed me what to do with these, which is what he did, and he never had a sanitary problem in the restaurant, and we have here in this country, possibly the most strict rules for sanitation anywhere. He put his in his commercial dishwasher, which I do not, as it does destroy anything that is wooden, such as steak knife handles, and we also wash any knife by hand. My knives are precious to me and they are all Henckels(no affiliation, etc) except my Chinese cleavers which come straight from China, and are carbon steel, will rust like crazy, if they are not dried, but they work like stink, and are easily sharpened... a good Chinese cleaver will outperform any other kitchen knife... I have two of them. So, just my experience with chopsticks...and I do have an extra long cooking pair...My Doctor told me to stay away from fat!! Cheers, Doug in BC