elastic bands mate, they work wondersto be honest i hate lids now - the bit of plastic that hold the lid up on mine broke so the lid wouldnt stay sprung up - which led to me on several occasions doing the classic - opening the lid, grabbing your pod, filling only to realise the lid has flopped back down.
speed feeds have their disadvantages but overall they rock over a lid - i just let my balls get wet - they do make great patterns in the air.
the only thing i do is leave my hand over the top whilst waiting at the start gate.