Amazon has 2-Pack 0.5L sodastream Twin Pack Dishwasher Safe Slim Bottle (White) on sale for $8.49 - $0.42 (5%) when you check out w/ Subscribe & Save = $8.07. Shipping is free with Prime or on $35+ orders.

Thanks to Deal Hunter jk6812 for finding this deal.

• Note: You have the flexibility to manage your Subscribe & Save subscription at any time after your order ships. View Subscribe & Save filler items and our current Subscribe & Save Frontpage deals to unlock up to extra 15% savings when you have 5 or more items in your current monthly subscription.

Features:

• 2x 1L carbonating bottles for SodaStream soda makers, compatible with all SodaStream machines except SodaStream Aqua Fizz, Duo and E-Duo
• Hermetically sealed caps retain carbonation longer
• Bottles last up to 2 years
• Eliminates waste from disposable bottles and cans
• Dishwasher Safe