Thoughts prompted by watching last night’s BBC programme about waste:-
Why use teabags? Leaf tea is half the price. If you are worried about tea leaves, use a teapot and a strainer. You can also use a muslin bag tea net to hold the tea leaves, which makes it easy to take the leaves out when the tea is done, and also to compost them.
Why use sandwich packs? If you cannot make your own sandwiches before going to work, why not go to a sandwich shop and buy them ready made?