As for a "trustworthy" site... If you are worried about being flagged by some 5/0 or authority ppl, don't be. Bongs are just glass art now. The war on bongs fell a while back. But as for a reliable site ie: shipping, rates, package handling etc... Try looking into the feedback on the site. There are many review sites about sites. Just type in the site you want on google followed by the word review.
Happy shopping!