I just happened to look at their site yesterday and they are having this sale through 9/22. It's similar to the last sale thread posted here on BBB except I don't recall any 75% off in the last sale.

Bags are 50% off and slingsax, minisax, and stainless water bottles are 75% off (only one style left at 4.74). No code necessary, prices are already marked at the discount. Flat rate shipping is 5.95.

I love the graphic bags and these are excellent prices. I've tried a ton of other reusable bags and have dumped them all in favor of these. The only time I recall seeing them for less was once in a Living social (or maybe groupon) deal that had a set of bags offered at the same time as a $5 off code.

www.envirosax.com