THE CHALLENGE COMMUNITY, ON-LINE!
Louise is referring to the Highlands price which hikes to £15 when selected. The site is a tad misleading.
Camping & Leisure do however, have an eBay site and the SmarTube is available to everyone OUTSIDE the highlands for 1.99 + 1.50 P&P.
I just ordered 2 at 3.49 each - one is being attached to my bottle, and the other tagging along on the train with me for Louise to collect at the Strathcarron bar on Thursday 10th.