Abstract: A retention device for retaining cylindrical containers in upright condition for transport, such as in a truck trailer. The retention device includes a plurality of vertically oriented container retention posts supported by upper and lower support rails. The retention posts are laterally spaced relative to each other such that a plurality of containers may be positioned in predetermined side-by-side relation with each container being disposed against a respective pair of retention posts and with additional containers being stacked outwardly thereof. Adjustably engageable straps are provided for releasable engagement with selected of the retention posts for encompassing the positioned containers within the rack and for retaining the containers firmly against the support posts and against each other.