Robinson's Crushed Lime and Mint is very good, if rather sweet. I do rather love Lidl's Deluxe Raspberry Lemonade. But in the summer we usually our own lemon squash (or lemon with mint, or lemon with elderflower). I also love my home-made lemon barley water; these days I use my instant pot to cook the barley. I used to make it for whenever I visited my father during his last illness, as he loved it, and always kept a sneaky glass or two back for my own consumption!