Amazon has the Waterpik Cordless Pulse Rechargeable Portable Water Flosser (WF-20CD017 Gray) for $40 - $5 off coupon (check "Apply Coupon") = $35 with free shipping. Has 2 tips, 2 speed settings, 6oz removable reservoir, up to 45 secs floss time, li-ion battery with recharge indicator, USB charger, and is waterproof for shower use.