With iOS 8 you can now stache pages directly from Safari with the Stache action extension.
Tap the action button, scroll to the far right and select the ‘more’ button from the options available.
Enable the ‘Add to Stache’ option by toggling the switch and drag to your preferred location.
Just tap the Stache icon in the actions menu to display the ‘Add to Stache’ screen.
Download Stache for Mac and iOS