I got some of the karigane sencha teabags and the green tea with matcha teabags... but I only so far tried the ones with matcha. They tasted more pleasant when brewed hot to me. It is possible that my water bottle was a quantity too small for the tea bag... the website does remark that the teabags are strong and one bag is good for a liter of cold-brewed iced tea. I used a smaller 20 oz. bottle, but I was drinking on it all day and constantly refilling it to top it up with fresh water as the day went on. It just tasted alittle fishy to me, but maybe it was just me. I got this same taste from another attempt at coldbrew with a cheapo sencha from a local Asian grocery, and I ended up dumping it in the compost.