Obtaining information from a parent control

I am trying to obtain information from a parent control in ASP .net.

First let me show you the code:

Code:

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        <asp:Repeater id="rptProducts" runat="server">
            <ItemTemplate>
                <h8>
                    <b> <%# Container.DataItem ("ProductName")%></b>
                    <asp:Button id="btnNewPhase" runat="server" BackColor="Blue" ForeColor="White" Text="New Phase" Font-Size="XX-Small" Width="60px" ToolTip="Click this button to create a new phase for this product"></asp:Button>
                </h8>
                <asp:dataList ID="dlstPhases" Runat="Server" DataSource='<%# FilterPhases( Container.DataItem( "ProductID" ) )%>' RepeatColumns='5' RepeatDirection="Horizontal" CellSpacing="20">
                    <ItemTemplate>
                        <a href='<%# String.Format( "CDContentsEdit.aspx?id={0}&product={1}",Container.DataItem( "CDID" ),"Product Name") %>' > <%# Container.DataItem( "Phase" ) %> </a>
                                    </ItemTemplate>
                </asp:dataList>
            </ItemTemplate>
        </asp:Repeater>

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What I'm trying to do is obtain the value of "ProductName" in rptProducts where the text is red inside dlstPhases. I've tried Parent.Container.DataItem() But that doesn't work. I can't seem to figure it out.

Any ideas?