I am with everyone else, I love my kleen kanteen. that said I do actually own sigg (the lining is tested and safe) and though cute I do not like them near as much. They are not as easy to clean and I don't like the caps as much as kleen kanteen, we have both the big kids and little kids sigg as well as the sports cap and sippy top kleen kanteen. We had the foogo (by thermos, same as the funtrainer by thermos only funtrainer has designs) and though it comes with an extra straw it was the rubber straw on ours that broke very quickly and it doesnt come with an extra of that. You have to order replacements. I also did not like these as much as kleen kanteen. they are easy to clean but i didnt like the flip top/straw top nor did I like the fact it was insulated (so 2 pieces connected).
I used the rubbermaid ones someone mentioned years ago and they are leak proof and a great size for the lunchbox. Havent owned one recently to look at the plastic but when a drink is going to be sitting in it all day I tend to go for the safer plastics, so #2, 4 and 5, on the bottom. #3,6, 7 contain pvc or other bpa containing plastics and should be avoided when something is sitting in them or if it will be heated