SAVE UP TO 50%: As of April 28, get the Monster Cube 1 Portable Bluetooth Speaker for $19.98, down from its usual price of $39. That's a discount of 50%. Alternatively, get the Monster Ripple Portable Bluetooth Shower Speaker for $24.97, down from its usual price of $39.99. That's a discount of 38%. $19.98 at Amazon $39.99 Save $20.01 $24.97 at Amazon $39.99 Save $15.02 The warm weather and sunny days of summer are almost upon us, and if you plan on spending a lot of time outside, no doubt you'll want to take your favorite music with you to share it. Or maybe you just want a way to listen to your tunes in the shower. That's where a portable speaker comes in handy. Right now, Monster has you covered right now with two deals you won't want to miss. As of April 28, get the Monster Cube 1 Portable Bluetooth Speaker for $19.98, down from its usual price of $39. Alternatively, get the Monster Ripple Portable Bluetooth Shower Speaker for $24.97, down from its usual price of $39.99. That's a discount of 38%.…