Yes - it’s the SWTC Bamboo in Turqouise Green. They have both solids and variegated colorways. I really liked tequilla and parrot, but wasn’t sure at the time if the lace would look good with variegated yarn. I found it doesn’t matter: here’s a beautiful pic of a tequilla LBT.
I love how the bamboo yarn drapes, and I also like that the decreases aren’t very noticeable. I think a silk, silk blend, or cotton/tencel blend would also drape nicely. A few people on the KAL used yarns that aren’t drapey as the pattern intended, and their FO’s (as beautiful as they are) show this .
I found my yarn at www.fullthreadahead.com for $9.50/skein ($4 off/skein!). It might still be on sale there (or other sites).