Amazon has Summit Mosquito Dunks 20-Pack on sale for $18 . Shipping is free with Prime or on order $25+
- Kills mosquitoes before they’re old enough to bite
- The only product with bti, bacteria toxic only to mosquito larvae
- Lasts for 30 days and treats 100 square feet of surface water
- Non-toxic to all other wildlife, pets, fish, and humans
- Labeled for organic gardening by the US EPA
Amazon offers free shipping with $25+ orders or get free 1 day shipping on all orders with a free trial of Amazon Prime. A prime trial is also free with Amazon Family (which also gets you up to 20% off diapers among other benefits) or Amazon Student. EBT/Medicaid Cardholders can save on Prime Membership here.