from my friend tin lizzy's facebook:
"sometimes you just need your tarp to stay put"
yes, those are full beers weighting down the tarp over the unfinished chicken coop!
here's her explanation on using full beer bottles rather than uncapped ones, or ones re-capped after being filled with sand:
"yep they're full! the twine stays put better with the caps still on, and and they hang better with beer in 'em. Although yes - your solution is more elegant and long-term! Is all good - next couple days they'll stay pretty chilled out there, they just need to stay put til the boys come back monday!"